Thank you so much for playing and for the feedback!
I appreciate you letting me know about the SFX getting repetitive, I’ll add more variety in a future update. I’m also working on balancing the difficulty. Since I was the only one who playtested, I didn’t have enough information and just increased HP by 20, but I think that wasn’t quite enough.
If you decide to give it another try, a couple of tips: the Overload reaction (Charge → Bomb) can stun enemies, and wave 6 is a good chance to heal using the water combo and farm AP/Void Bombs before the final wave.