Thanks a lot for checking out my game :D I'm happy you saw potential in it!
The light bulb's use seems simple in the first 10 levels, but after that other light bulbs gives you different abilities, so holding them or not makes a big difference, that's why from start I teach players they need to hold them.
Your recommendations are really good. I need to work more on the player movement, the coyote time is really something that it needs! I didn't know it was called like that ahahaha, and also the jumping. Thanks for the video recommendation, I already saw yesterday the GMTK one, I'll see the other one :)
Thanks again for the feedback, I really appreciate it!