Interesting! It's nice to have an actual universe I'm running around in for once, though the initial text wall was maybe a bit much :) I dig the kinda Flash-esque... "skeletal" animation on the legs, which works surprisingly well with pixel art.
I died a lot, and in fact it seems like everything shoots so hard or fast that I die the instant it appears on the screen, and the only way to make progress is to memorize all the obstacles and dispatch them before they become visible. Rewinding time is a very cool mechanic, but I don't seem to be able to use it after I die, so I ended up not really using it at all.
There's clearly something here, and all it really needs is a few numbers twiddled! Do keep working on it :)