Hey,
Thank you so much for the feedback! You're probably right, I have to admit I'm rather new to designing games (so feedback like yours are important in my learning process).
I have updated the game so it spawns more coins, and some items (including batteries) were made more powerful. Hopefully it's getting closer to the right amount of difficulty.
Please let me know if the game is still too difficult, or becomes too easy.
Thanks so much once again for the feedback (and the video)!