I just pushed an update with gamepad support and a few other fixes including the boss not dying when it should, tell me what you think.
Thanks for the feedback, I'm glad you had fun despite the issues.
Played for a bit, here's what I think:
-RTrigger to shoot is pretty bad(travel time before actuation), it should be swapped with RB, which currently throws your gun away. Likewise, the melee throw could go on the LTrigger, but maybe it's more apt on a button since throwing a melee is more viable attack.
-When going to pause menu, for some reason the mouse cursor is frozen(the in game graphic, actual one is fine but invisible). Doesn't matter if you're in KB&M or controller mode.
-I found out that you can shoot your gun while dead, which is kinda funny. It happens because you drop the gun on death, but if your body bounces into it it will be picked up again.
-Aim assist, if there at all, is subtle. The enemies are small enough that you can aim right at them and miss by a hair or two if you're a distance away. Though take with salt, I'm not the best at twin stick shooters on controller.