The mouse works OK for me, but I expected the turbo button to increase the speed at which I moved with the keys, not to jolt me in the direction of the mouse. It felt weird! Anyway, with the mouse it works as an emergency avoid move. Good stuff, although a bit confusing at first.
Do you think it would be interesting to add a "warp" move? That would give the player a means to survive that mean purple fiend
Maybe you could need to stock up coins to use it, adding to the thrill of the game
On a minor note, the text input for the high scores name being in red makes it difficult to read.
All in all pretty fun!