nice
it still has some bugs, but overall it was good... impossible mode was good gave me a challange. also i noticed when u got ur friend speed high enough it started to glitch and make the game almost impossible in normal mode. ie your parasite would get stuck in the top most part of the screen. not sure if that was just a one off or not but yeah my size was huge, buddy size was huge, and buddy speed was insane lul.
anyways next time you make a game like this change the way the upgrading page works. it increases your abilitys very slowly, and shows decimal places (would look better as a dot in a bar to show you have just bought an upgade). also you might consider adding increased values for upgrades, and perhaps the addition of white blood cells come to eat you would make it more interesting.
its a fun game, but gets boring after about 15 rounds. but anyways i agree with Sin-Crow, this really is a good game but some people just dont like it. good game!