It seems like it should be quite fun to play with mouse, but owning just a laptop with touchpad makes it realy hard to aim and almost impossible to attack (no discrete buttons on a trackpad, just the touch surface). Provided that it's made in Godot you may want to add an "attack with left mouse" controls, or, even better, add twin sticks gamepad support, which shouldn't be that hard.
All in all, nice game with the vibe of old game Alien Shooter and the like :)