To move around the level map, you can use the arrow keys (left and right to move to the next level) and then hit enter to jump into the game. I tweaked the how to play section in the description to reflect this feedback, thanks!
hmm, now i cant seem to select the play button, im sure it was the enter key
Hm, that's funky. We'll add it to the list of bugs we gotta fix in the future, thanks for pointing that out!