Thank you for playing and for the constructive review!
1. Sadly I'm not experienced enough and couldn't find the time to understand how to handle performance. I will keep that in mind in future projects. (And update this one if possible).
2. Indeed I understand, I tried to sort of use the lighting to guide the player, but I can feel it myself. I tried to go for a "Should I try to jump here"? "Is it even possible to reach here?" Kind of feeling.
I'm not experienced in level design either. But the most obvious thing would be to add a layer of blurness for the outside of the playing field. There are many ways to approach this, so I recommend you to find your own solutions which could be more suitable than someone else telling you.
I mean all the videos and courses out there are aiming at the general areas and tried to cover as much grounds as they could. So it's a good idea to try and personalize your games.
