For what it is, MonoLiTH is a good looking game. Mixing 2D with 3D is not a new idea, although this game does take a unique approach. The sprite work is not bad, and the style fits together well, but I do feel like it could be more memorable. It is fun to watch though.
Simple, basic music that sounds great while you play, but you'll instantly forget it once you quit. The sound effects are good but minimal.
There are four themed worlds, although the final world mixes the previous three. Within the worlds, which are 3D platforming sections, you must collect puzzle pieces and kill enemies with various weapons. The levels are insanely difficult, and require you to memorize them.