It lacks replayability.
The idea of taking the "COD Coldwar" mystery box system, sounds fun.
For now its underdelivered, but
I can see there is a skilltree system, even if its just a murky soup of % buffs at times,
I hope you will expand upon the idea, even if playerleveling is not yet implemented.
I hope you can expand the gunroster to be more than the MP5, M4A4, and USP. Maybe make more spicy zombie variants.
A remaking the maplayout for the upper floor unlocked past wave 10 should be considered as it both causes,
The game to be quite boring as you camp the stairway and win waves while also having to go cleanup "zombies"
that get stuck on a railing while pathfinding to the player it happens near the shipmentcrates from the first arena.