I tried version 0.126, which is already more playable. Fps is kept at 15, sometimes falling in random places to 5-6. Approaching close to the trees, the fps drops to 5 always. With a large number of shots, it also decreases to 5. The character still moves quite slowly, the control of the handle still needs to be adjusted. It seems to me that you can try to reduce the size of the sprite of the shot, then you will be able to avoid FPS drops when shooting.