This game reminds me of Spacechem, only it doesn't feel like homework.

Splice is a game made by the creators of Spacechem. It is an experimental puzzle game where you are given a limited number of "splices" to re-arrange the composition of a cell. You do this to try and match the predetermined shape given to you.

...Yeah, that sounds complicated as hell now that I think about it. But it is a complex game. Each level is a puzzle that needs to be solved. Its an interesting puzzle game, but the presentation is what I think makes the game. The music is great, creating a peaceful and calming atmosphere. The graphics, while simple, are very pretty, with cells moving in an organically smooth way when moved.

Its a small little puzzle game, but I found myself enjoying it much more than I thought I would. Give it a go.