I’ll list my feedback in points:

1. I played more than 10 times to get used to the game. For the first 3–4 runs, I was mostly trying to understand the controls. The tutorial didn’t make them clear enough, and I still wasn’t fully sure what the Tab key was meant to do besides showing some text.
2. During reloads/restarts, my cursor often moved outside the game window, which broke the flow and caused avoidable deaths. This is common in browser games without fullscreen or cursor-lock support, so a fullscreen option would improve the experience a lot.
3. I didn’t understand the purpose of the countdown. It might need clearer context or feedback.
4. After surviving for a while, the game suddenly spawned a huge horde of turtles/enemies. The difficulty jump felt too abrupt, going from manageable to overwhelming very quickly. A smoother difficulty curve would keep the game more engaging.
5. I wasn’t sure what the swirly object was supposed to do. I stood on it for a while thinking it might heal me, but nothing obvious happened. It may need clearer visual/audio feedback or explanation.

Buen juego, pero donde consigo mas balas? Me quede sin balas en toda la partida XD