I feel like the movement would have needed more polish. It wasn't bad, it performed well, up until you asked to do precise things. Then it start to feel like it doesn't do what I told it to do. Especially on the zig-zaggy level. It either didn't put down the mine or didn't jump, even though I pressed up and down, both. At least this is what it felt like. Yet again, it was happening really quickly.
The main mechanic, which is that you cannot kill enemies, only temporarily disable them, felt creative. However it feels like it could have been explored further, without presenting an extremely precise level, that feels more of a hassle than a challenge. This might only be because I'm not that good at it.
Sadly it does not follow the 84x48 resolution, otherwise it would follow the restrictions perfectly. Sadly both the enemies and the player breaks the resolution limit, they are most of the time between the "pixels". Another thing is that is should not use the mouse, hence the Nokia 3310 didn't have a mouse, only 12 buttons.
Overall, pretty nice game with consistent visuals! :)