Games with dynamically modifiable prizes based on game winning symbol positions

1. An electronic gaming machine comprising a game controller, a player interface, and a display device, wherein the game controller executes instructions from a memory which cause the game controller to at least:

display a plurality of symbol display positions;

display a bonus array comprising a plurality of visual elements, each visual element being uniquely associated with a symbol display position from the plurality of symbol display positions during play of a base game, at least one visual element indicating a bonus award;

select a symbol, from a group of symbols including one or more trigger symbols and one or more non-trigger symbols, for display at each of the plurality of symbol display positions;

determine whether at least one of the plurality of symbol display positions contains the one or more trigger symbols;

upon determining that the at least one of the plurality of symbol display positions contains the one or more trigger symbols, determine a modification to a base prize, if any, based at least in part on a visual element associated with the at least one of the plurality of symbol display positions containing the one or more trigger symbols; and

cause an animated removal of any symbol display position containing the one or more trigger symbols to be displayed.

2. The electronic gaming machine of claim 1 , wherein each of the at least one visual element indicating a bonus award is associated with at least one of a numerical value for addition to the base prize or a multiplier for multiplying the base prize.

3. The electronic gaming machine of claim 1 , wherein the bonus array and the base game are displayed on the same display device.

4. The electronic gaming machine of claim 1 , wherein the bonus array is displayed on an auxiliary display device.

5. The electronic gaming machine of claim 1 , wherein each visual element is selected from a group of the plurality of visual elements.

6. The electronic gaming machine of claim 1 , wherein the game controller executes instructions from a memory which cause the game controller to change the visual elements of the bonus array after every N plays of the base game (where N≥1).

7. The electronic gaming machine of claim 1 , wherein the game controller executes instructions from a memory which cause the game controller to change the visual elements of the bonus array between plays of a base game in accordance with a predefined probability.

8. The electronic gaming machine of claim 1 , wherein the game controller executes instructions from a memory which cause the game controller to change the visual elements of the bonus array in response to a player input.

9. The electronic gaming machine of claim 1 , wherein the bonus array is displayed on a touch screen and wherein the game controller executes the instructions from the memory which cause the game controller to enable a player to move a visual element via a touch input.

10. The electronic gaming machine of claim 1 , wherein a probability of a trigger symbol being associated with a particular symbol display position is at least in part determined by a requirement to meet a predetermined criteria.

11. The electronic gaming machine of claim 1 , wherein the game controller executes instructions from a memory which cause the game controller to cause an animated removal of the, or each, symbol display position containing a trigger symbol to be displayed on the display.

12. A method of operating a gaming machine comprising a game controller, a player interface, and a display device, comprising:

displaying a plurality of symbol display positions;

displaying a bonus array comprising a plurality of visual elements, each uniquely associated with a symbol display position from the plurality of symbol display positions during play of a base game, at least one visual element indicating a bonus award;

selecting a symbol, from a group of symbols including one or more trigger symbols and one or more non-trigger symbols, for display at each of the plurality of symbol display positions;

determining whether at least one of the plurality of symbol display positions contain the one or more trigger symbols;

upon determining that the at least one of the plurality of symbol display positions contains the one or more trigger symbols, determine a modification to a base prize, if any, based at least in part on a visual element associated with the at least one of the plurality of symbol display positions containing the one or more trigger symbols; and

displaying an animation showing removal of any symbol display position containing the one or more trigger symbols.

13. The method of claim 12 , wherein each of the at least one visual element indicating a bonus award is associated with at least one of a numerical value for addition to the base prize or a multiplier for multiplying the base prize.

14. The method of claim 12 , further comprising displaying the bonus array and the base game are displayed on the same display device.

15. The method of claim 12 , further comprising displaying the bonus array on an auxiliary display device.

16. The method of claim 12 , further comprising selecting each visual element from a group of the plurality of visual elements.

17. The method of claim 12 , further comprising changing the visual elements of the bonus array after every N plays of the base game (where N≥1).

18. The method of claim 12 , further comprising changing the visual elements of the bonus array between plays of the base game in accordance with a predefined probability.

19. The method of claim 12 , further comprising changing the visual elements of the bonus array in response to a player input.

20. The method of claim 12 , further comprising displaying the bonus array on a touch screen and enabling a player to move a visual element via a touch input.