I like the tutorial, it does its job without being too intrusive and it's good to get a little bit of lore.
While you're reworking levels, maybe you could also fix the perspective on some of the giant-sized rooms
The akimbo powerup is fun, firing the akimbo tommy guns lagged my game and picking up the shotgun while the akimbo was active lagged by brain, it's so unexpected to see 4 mirrored hands picking up two shotguns at once, it got a laugh out of me.
I didn't replay the other two levels since I think they're still the same.