Defend sprunkibox shooter

Defend sprunkibox shooter is a fast—paced first-person shooter in which you fight hordes of insane sprunki who seek to destroy everything in their path.
Your main task is to protect the sprunkibox, the mysterious object in the center of the map, from endless waves of enemies. Use a diverse arsenal of weapons and collect power-ups that appear on the map to survive as long as possible.
Each round is getting harder, the sprunki are getting faster and stronger, and you're getting angrier and more accurate.
How many waves can you withstand before the sprunki break?