I don't get the timing for the dash slug(the red one).
the dimensions of the screen were off. it showed the complete screen on one comp but on the other, it cut out the score and health bar. (BUG)
just a few suggestions you can add later (if you want of course):
a heal slug which gives health on killing it, or a healing shot which heals us and does no damage to the enemy,
slugs that require specific ammo to die. they are immune to every other ammo except that one which can one-shot them
a pause button and a menu. :) how do I exit, I m stuck in the game forever? I can't leave (lol)
reload button to reload the gun
i might add a few more ideas if any pop in my mind
a great game though. i enjoyed playing it