Chasm could be described as an homage to the older titles of the Castlevania -series. You explore areas in a 2d environment, gather items and abilities, unlock new areas as you progress and fight the occasional boss. There are spells to cast, weapons have different speeds, ranges and damage numbers, and you can level up your character as well. Bigger and heavier weapons are usually more cumbersome to use than light weapons, affecting for example the length of the attack animation.

The levels you explore are also somewhat procedurally randomized each time you start a new game, altough I feel the changes aren't drastic enough that you should even notice a difference while playing. There are six different areas/tilesets which doesn't feel quite enough, but isn't horrible either. Exploring is generally fun, but can get tedious if you happen to backtrack through an area for the fifth time.

The game is somewhat short (about 10 hours), but maybe that's just because I enjoyed the game and wanted to explore more areas. All-in all, I'd definitely recommend Chasm if you are looking for a good quality Metroidvania type of game.