I was surprised by the side scroller like camera choice but it actually works really well once you get used to it, good melee and ranged weapon variety and a few different zombies. I actually believe you have a good base for a solid game. I think the current weaker point would be the UI, no one likes to working on UI but the main menu and HUD does sell the game a bit short in my opinion. Other than that the game feel could always be improved but I think is going in a good direction. Getting overwhelmed by zombies might be a little bit to easy, finding a way to offer a second wind could make the run loop more enjoyable. and of course AoE weapons like grenades or molotovs would be super satisfying. Overall great work, keep it going!