The gameplay loop is a decent time (especially once you unlock teleporters). Not fond of the fact that there's only a final boss and no other actual bosses.

Also, very much not a fan of the wall jump, as it always felt finicky to me. Sometimes, I'd jump from point to point no problem, other times I'd just drop back down next to the wall instead of making the jump properly.

That might be a me-issue, but that's not something I usually have a problem with in games.