I'm too lazy to make a proper remix. Anyway P1 (the mosquito) is a life steal maniac. it has the same health but does not need to charge up the heavy attack, does huge amounts of damage on the quick one but has smaller life steal, and has an extra ability. How to life steal as mosquito: Heavy attack, stuns (both ways), and quick attack. P2 (Gaster) had a re-skin, extra movement speed, has 1.17B health, and a new ability. Same damage.
Same controlls. But P2 (Gaster) has 1 new ability. If they press "p" they will gain 500M more health (one time use). Gaster takes much more damage from stuns now. Mosquito also gained a new ability. Upon pressing "Z", they well lay a weaker clone that lasts for 15 seconds.