Really excellent job! The game felt very polished - I'm impressed you were able to get this much done particularly considering it's your first game!
I like that you took the time to include a backstory, I think that really fleshes it out.
And the sound effects and music were spot on.
Level design felt spot on as well (admittedly, I didn't make it very far haha).
One bit of feedback is: I think it might feel nicer to have the jump button as the space bar? Or something other than the up arrow. It didn't feel natural doing the wall jumps with the up arrow, I think the space bar or a button with the other hand would help?