Hello! Welcome to Feedback Quest 8! My name's Hythrain, a co-host and one of the streamers for this event! This feedback is being written live as I stream your game! If you're interested in seeing my live reaction, let me know and I can send you a link to the VOD once it's posted to YouTube!
So my normal approach for any game in these events is simple: I get the game, make sure it's not a virus, then play it with as little information on how to play as possible. This way, I can judge how intuitively someone can figure out the game. Only if it's obvious that I need to read more will I do so. I note this so you can get a sense where some of these feedback comes from. In addition, I want to note that feedback and rating are different; don't use this feedback to gauge what I'll rate, nor should you view my rating as entirely indicative of my feedback.
When I was playing this, I found my enjoyment depended greatly on which mode of the game I was doing. When I had the more free-roam parts, it was a lot more frustrating to play. The character would slide around when doing any movement, and in general tank controls (where you only move if you're going forward or backward, while the side buttons just turn you) make it really challenging to aim. On top of this, I often had issues with the fast zombies coming up behind me and attacking me.
However, once I moved to the second part, where you're defending the barricades, it felt a LOT better. In this scenario, the slide was actually very nice and became predictable to rely on. I could run from one side of the area to the other and have a good sense for when to let go, making me slide right into the spot I wanted to be in.
Since I imagine there will eventually be a mix of free roam and barricade parts, it feels important to get the free roam movement down. Normally, a first person game would use the mouse for aiming and then use WASD for movement, with A and D being strafing. However, I have a feeling you don't want mouse aiming to be part of this so I'm unsure of any particular way that could help. Perhaps what may help is to slow down the speed of enemies in free roam. For example, make the fast enemies move as fast as the slow ones do now, and make the slow enemies even slower. This would give the player more time with aiming and would make it less frustrating.