Hey, glad you enjoyed it and thank you greatly for the feedback!
The player does move fast for sure, on the hard mode(the original game mode I made) the enemies do hit fast so you have to keep moving. I guess I made the normal mode too easy maybe, since the attacks and enemy projectiles are much slower. I got a lot of feedback from people who were finding the game to be way too hard. Agreed about the eating mechanic always being a fall back, which is intended but as you said it can make it a little easy.
I like the idea of the blood/gut currency but feel it would slow the game down too much. I'm going for a fast paced old school fps and I feel it would break pacing. Definitely agree on the puke being more like a bfg though, it's currently just the first pass on it so it's super rough and is only there in order to stun enemies. Was thinking of it only being able to be used when you get the meter at certain levels, maybe 30, 60 and 100 percent of the gut meter and each does a different and progressively more deadly special bfg like attack.
Also in regards to the slowmo, yeah it needs a re-work and will be just one of the spells you get as you progress as this is only the first level. I already have a dash/blink like mechanic in the game but it's something you gain in the second level as I didn't want to overburden the player with new mechanics all in the first level.
Definitely agree the puzzle/platforming parts feel out of place and breaking pace, thinking of removing them mainly and only keeping puzzles as ways to unlock secret areas so they're not necessary for the players general progression through the level.
I'll take a look into the v-sync thing.. Quite strange :\ and for sure the audio levels need a pass, I'll add that to my to-do list.
Do you have discord? Might be an easier way to get in contact than twitter. And yeah, use blender. I need to transition to it myself, I'm sick of 3ds Max and the crashes I've been having in it for the last 10 years or so.