Nice short experience, with a nice kind of back and forth progression in the level competing with the timing of the magnet and increased distance you can travel thanks to batteries.
-My favorite part is the in-level 'checkpoints' when you get on the other side of an object so the magnet can only drag you back so far. Feels really satisfying to keep your progress towards your goal like that.
-As enjoyable as it was, I think with more creative levels and tightening of the time you have available to escape the level, it could feel like a more complete package. Doesn't require a lot of levels/I don't think the mechanics would necessarily benefit from that, but just strengthening what you have and maybe rounding it out to 10 could be nice if you'd be interested in working on it more.
The balance of trying to get the battery but not moving so far as to hit the spikes for example was a nice extra layer of tension thanks to the mechanics.
And the gaining of batteries could be made to feel more substantial, like a punchier sound and expanding the battery when you collide with it plus some electric-like particles. Especially when that's such a core part of the game.