Thank you very much for this very constructive feedback.
I haven't had time to fix the bug that triggers the device to go backwards, which is a bit frustrating! But I know that in the context of a Game Jam, it can be forgiven, haha.
As for the pixels being too big, I actually saw a little tutorial on that at the end of the jam, so unfortunately too late, but I'll try to be careful next time I use them.
Thanks again for the feedback!