not having some sort auto reload complicates the game (without adding any depth )and the control a lot more,making the barrier of entry higher
pressing A+D on keyboard is also a lot easier than pressing both m1 and m2 on mouse
tbh it would be better of using A+S+D or whatever three keys instead of two
everyone else already listed the great parts of the game so i wont repeat it
it defintely has the potential to become a full game like downwell w
the screen not being high enough also means players big boost very easily leads to death