I have to agree with the controls, not very convenient for a Righty.
Maybe for the next one, jumping on Atomicchipmnk's idea here.
Make it so you can use either WASD or arrows, using the mouse still to control the blob, but rather than having the blob always there ( it gets in the way, honestly) Click to activate blob when you need it and control it independently from there.
Summing it up:
-Having the blob on the screen all the time gets in the way in spots.
-The controls are very friendly to right-handed folks.
Other than that, it's a fun little game.