nice concept !
I got some issues with colisions / speed of the goos but nothing dramatic!
the music fits exactly the mood of the game !
one remark for amelioration maybe, if you can add a little delay at the unspawn of the pit (maybe just 0.3 or 0.5sec), it will ease the levels but unfrustrate player ( I get some time had to restart the level because the 2 goos where not pixelperfect aligned ...)
But I repeat, realy cool concept of puzzle game, and well executed !!