could of been better
You stole a lot of ideas directly from amorphous+ , like the crappy stat acheivements, the different sized levels and survival.. you could of at least made an effort to make it look like your idea, you even mentioned nest somewhere which is what the amorphous levels are called
i won't criticize you for that anyway..
the big problem i had with this game is the acheivements..
you could of at least out a tiny bit of thought into them, they're the least creative goals i've ever seen
"die once", "die 1000 times", "die from a certain enemy", "touch the edge of the screen"... oh and "get 10 awards" really pissed me off
78 acheivements may sound good, but they're either too crap to even bother with or exactly the same but just slightly harder than the last one
if you want awards like that, then have one score award (for example) and give it different ranks instead of passing it off as 20 separate awards, it makes it seem a lot less cheap if you ask me.
oh and never have awards like "get 20 awards".. you can give the player a sense of accomplishment for getting a certain amount of them, but another award isn't the way to do it
also in a sequel you could try having unlockable modes, they're not essential, but they are really rewarding and can put on interesting twist on the normal game. You could probably sneak in a few extra acheivements for each game mode too :P
anyway it's a fun game for a while, it shouldn't be too hard to build on this :)
look forward to seeing a sequel if you plan to make one ^^