The polish in this game was awesome! I liked the aesthetic a lot, I'm a huge sucker for pixel art and the player animation looked really nice.
It looks like this game is almost a canvas for tons of other ideas that could build off of the sort of "pressed for time" sort of feel you get from your character's battery life constantly ticking down and there's nothing you can really do to stop it. It gives the whole game a sort of hectic struggle kind of vibe, except it lacked some of the obstacles that really would have made it hectic.
Navigating the levels felt pretty nice, but it wasn't enough of a challenge to make me feel like I had to hurry up and get to the next charging station before my battery ran out. I think adding some obstacles, like maybe some enemies or puddles of liquid that you have to avoid otherwise it causes you to short-circuit and lose all your battery life, would have really added to the feel of "danger" that otherwise felt a bit lacking.
Although maybe you were trying to approach it in a sort of way that was supposed to make the character feel like they had to master the movement mechanics to get around the level efficiently enough to reach the charging stations in time? Maybe it's just because I play way too many platformers but I feel like the movement was maybe a bit too simple to make me feel like it was a real challenge to do that.
In terms of presentation, the UI was spot on, there were a few mismatched fonts (pixel font vs non pixel), but all in all it looked really good. I opened the game and was immediately impressed with the main menu screen and the fact that there were 4 different menu selections you could choose from.
I first selected "How to play" and the screen that it led me to there I feel had a nice UI and look to it, it really fit with the fonts in the main menu, even if the tutorial itself could have benefited from some visual aid, it still felt like it matched the mood of the game's initial presentation. From there I went back to the main menu. When I started the first level I was relieved to see that it had basic instructions that showed me the controls. However, I feel like you should definitely mention that double jumping is a thing in this game, because I didn't realize that at first and it took me a few lives to figure it out.
Anyway this was a great submission for your first LD!! I hope I see you participating in some of the future events, keep up the good work!