Really enjoyed the game man. Everything feels pretty neat and responsive, I love it! Took me a while to realize that shotgun pellets need to shoot from afar, single bullet is straight up arse, laser beam is oddly satisfying, dashing is in most cases hinders you, and... ok I really don't know what's the loop-looking skill is for ;))
A few notes I would love to share though. The tutorial has so many words, which may cause majority of players to turn away too early. Maybe a way to visually teach the player instead? Moreover, a few skills are not that balanced, like the single bullet mentioned earlier, took forever to kill a single zombie. It could be because the zombie has too much HP, and just tank most of it. Killing em easier could have made the game feel more satisfying (ADHD stuff :D)
Overall, great game you have. So little ratings for this is criminal!