Thank you so much for your kind words and detailed response! I always try to have a high-ish production value. Polishing is my favorite part of making a game, and it helps I have so many talented artist friends.
The batteries not respawning is a glitch I noticed yesterday, I found it at some point, didn't write it down and it's still in there now because of it :(
I agree about a score/time limit and the lack of replay value. I just simply ran out of time to implement something like that lol. In my original vision for the game I wanted to have multiple endings for beating X number of levels without getting hit/dying and under a certain time limit. Like in the metroid series basically, which was a really big inspiration for the game (visually at least).