Always happy for suggestions! A little tutorial at the beginning would definitely help, i haven't really had time to think about that while working on it but i like the spacebar idea!
The screen transition I think has to do with the different screen sizes and the way I made the assets. I haven't really found a good solution to that yet but I'm looking into it for future projects as well.
Thank you so much for the feedback I'm happy you liked it (despite the awkward beginning ;p)!