I would say this is a good first try at a game.
I will say that it's confusing that the game has german and english language in it as I was unsure what the goal of the game was at first.
Not sure if it's my PC but the game starts to lag really hard after restarting the game once (I played browser version, could be that the game is not meant for browser).
The core mechanic of jumping around felt really clunky. Aiming where you wanted to traverse was hard.
Visually it's fine for the simplicity of the game, would have liked to see some more juice in this kind of game, vfx for hitting the walls + sound, vfx for hitting collectibles so on.
I will wish you good luck with your next project.