Thanks for the review, gendou_kun! I really enjoyed reading it, and I'm glad you liked the game! One clarification, though, is that no levels are handcrafted, everything is generated by the AI and players can upvote good levels, thus "discovering" them, and putting them on other players' maps! A level editor would be nice, though, I agree.
I'm glad you liked the graphics made by my friends at Noppa Design and also check out Anorganik, he made the sound effects and composed the music: https://soundcloud.com/anorganik