This looks really cool, I love the Crash 1 style gem platforms! The only bits of advice I'd have are using lerp (linear interpolation) in your movement and gravity formulas to get a nice arc when jumping. If you also used a more vibrant shadow like the one in Crash Bandicoot 4: It's About Time, precision jumps will be easier to track. Hope this all helps!
@dejikimoritzgztyuixc7227 Thank you very much for these tips, I have partially implemented the shadow for tracking the jump and landing position, unfortunately the shadow only works properly when I am in the air, otherwise it has currently disappeared under the ground. I'll test your tip with lerp and the jump later and see how the physics behave in the game. 😊