Frog Fractions (Twinbeard)
Frog fractions is a free browser-based indie game developed by Twinbeard. He’s also running a kickstarter for Frog Fractions 2, so feel free to donate a few bucks for him. BUT I recommend to not look at the kickstarter page before you play the first one.
Any additional info would be a spoiler. I don’t want to ruin anybody’s experience, so just click and play! Only keep in mind that this game takes much longer time to finish than you would expect.