This really is a great game, and I do agree, it is sorta like Gish crossed with Metroid. You explore "open-ended" levels and gain power-ups (freeze into a cube, steam into a cloud etc) that grant you access to more areas in the level, sorta like Metroid/Castlevania. Ive got 26 of the teardrops so far, and my biggest gripe is the controls are the hardest part of the game (and the fact that sometimes its not really clear where to go next), I wish they would allow button-only controls and added more platforming and harder puzzles.