I also couldn't get much further than the wall slide part - couldn't figure out how to jump off the walls unfortunately.
But the visual style, music, and overall direction is great! And especially nice usage of small size pixel-art.
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Hello and thank you for trying the game! Yeah, that part is rough. There isn't actual proper wall jumping, you can only drop from the wall horizontally while sliding by pressing the opposite direction at the right time. It will give a few frames of being unaffected by gravity, but the window to pull of many of those drops is probably too tight. I definitely need to improve the controls and the way players can get to learn them! Perhaps a short optional tutorial level where everything is quickly unlocked and tested before diving into the real expedition.
Cheers