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Ideas:
Change the controls so when you right-click a cell you delete it and to move the board you click the wheel. Also that when you press for example Q and then Q again the second time will rotate the pulser like you clicked one on the map.
Make a save/load system with files so you can keep many boards at the same times and also send boards.
Make copy/paste system
Do it so there is a way to destroy cells and rotate cells, this two things are really important for computers.
Despite all the things I want to be changed, this game is really fun.