Glad you enjoyed it!
Some kind of progression would have really benefited the game, because I do feel that when playing there is a sense of, "But what for?" especially without any kind of "Time Elapsed" or "Score" UI during gameplay. A kind of skill tree was something I had initially planned, since it played well with the idea of the character being a kind of parasite or infection, so seeing them literally "evolve" would have been fun.
Thank you for the feedback! I'll have to check out your game as well.