It's a nice little puzzle game! Loved it! It's been a while since I've played a "for the greater good" type puzzle game, and it's always a blast playing one. Good job on that! The graphics are cute, the puzzles are well-designed and easy to understand. The difficulty gradually increases with the levels, slowly teaching the player new mechanics one by one. This is very nice!
The biggest issue I ran into while playing the game is that one of the levels (two buttons with two lasers and a large pit) is bugged for me, that the corpse doesn't count as stepping on a button if moved in and died too fast. Not sure why that happened, and I am quite confused that the level exit doesn't work. The laser blocking system is also a bit strange too and sometimes the corpse doesn't block one correctly even if it's in the right space.
But besides the bugs, the game is generally very nice and I like it quite a lot. Good job!