!!!WARNING IF YOU HAVE EPILEPSY DO NOT USE THE BLOCK SHOWN WHEN YOU PRESS THE V KEY. THE PATTERN OF THE BLOCK MAY TRIGGER A SEIZURE!!! arrow keys or WASD, if you collect the shooting power up, use space, and use the keys E (to turn on eraser) and R (to turn off the eraser.). the newer blocks will be in the row Z to M. so in that case, in this game, you cannot change the background. the keys you need to press for different blocks are (1, 2, 3, 4, 5, 6, 7, 8, 9, 0, Z, X, C, V, B, N, and M.) love and favorite if you like it!