Played through 5 waves. Game looks very good, really like the menus too. Options only really need rebinding.
The big problem with the game is that the gameplay just isn't all that interesting; the plants never did anything to me, and the ranged enemies' projectiles are too fast and hard to see that getting close to them is just pointless. All I did was stay as far away as possible from all enemies and snipe them, using the dash as a sprint to stay further away.
Some ideas I had while playing was to first increase the distance fog so you can't see enemies far away (I think it works well with the graphics style) and maybe change every encounter into arenas instead. So you'd get locked into a smaller arena as you walk forward and then the enemies' would teleport in. If you'd combine that with slower enemy ranged projectiles and have them more lead their shots as you move I think it would be more interesting than just holding S and shoot.
All the levels are the same, got a winter theme once which was neat but the level was the same.
It never feels good to get a potion from a chest because you get them after an encounter and then you have to sprint to the next enemies just to make use of it. Making them items you carry and can activate when you want could work.
It should be clearer what objects you can interact with.
It looks great but some animations could be more interesting and weighty, like jumping and skeletons' walking.