Hi Tom:
Thanks for the feedback! Yes, the game did take a bit of inspiration from games like Celeste and Super Meat Boy, but I was going for more of a speedrunning feeling overall. About the visual signifier for the wall jump... maybe an quick animation that shows the player facing away from the wall? I don't really want the player to be holding onto the wall because that would slow down the pace of the level. In regards to making it more original, I think that considering more level mechanics and unique abilities of the player would be a cool to add in the future. I like the idea!