I played this game only 4-5 hours and didn't finish it. Chasm is quite hard game. You die and repeat some sections so many times, that's not much fun. Some ideas are good, for exsample side quests, when you save villagers and they sell weapons, gems or food to you. There many types of enemies (zombies, rats, golems or bats) and bosses. The game is about fighting with right tactics, jumping across traps and finding right way, but there is many backtracking and many dungeons looks too fimiliar to each other, so it is not so much good.
I think that whole game looks and feels like worse copy of Castlevania and Metroid. There are many similar and mainly better games than Chasm on VITA (Shovel Knight, Rogue Legacy or underrated Batman: Arkham origins blackgate).