A promising start for a dark cave exploration / metroidvania game!
I love that you used the Abuse main character, it bring back a lot for memories of this (scary!) game! The graphics overall are good, and the large cave was interesting to explore, with a lot of jumps and ladder.
Regading platform movement, as another comment noted, I too fell that the main character is a bit "floaty". I think the jump is maybe too "long", or maybe by having a stronger gravity I would like it better, but this is a bit nitpicking, and I know platform movement is very hard to design.
The game needs music the add to the already great atmosphere of being lost and lonely in a large cave. I'm looking forward the next versions of the game!