I still haven't played all the way through - it's difficult, but I thought I'd at least post a batch of screenshots detailing my first run. 111. I didn't get very far, but here goes...
The beautiful title screen.
And control selection. I gave them all a try, but soon settled for the first.
After that... just Duck and Go!
And don't forget to jump too.
Splatter looking good!
It might not have strafe capability, but you can shoot through the ceiling!
Another difference here is that enemies do not attack each other, no matter what this looks like.
Really. No matter what.
...and once again: the carnage is on!
Btw, those demons can jump. But so can I.