Use the up arrow, the "W" key, or the space key to jump. This is only the pre-pre alpha, so the real game will be better. There may be bugs, tell me and I will try to fix them. By the way, the final version will not have the spikes moving at random speeds. If you ask me, I may add your cube into the game.
I give credit to @griffpatch, for giving me the ideas to make this game. (should i continue this?)
