Mechanically, this is extremely solid - shockingly well put together. Controls feel tight and responsive, default keyboard layout is a bit odd but with some adjusting it'd be fine, and I can imagine playing with a gamepad would feel great. It feels like it's been years since I've played a game on Newgrounds that felt as competently-made as this.
The writing, on the other hand, is not so good. All of the dialogue is messy and stilted, and the whole "conjoined twins who make out" thing is just weird and pretty creepy. I've never understood folks' fascination with twins who kiss each other. Really just spoils the whole thing, for me.
The sprite work is decent, but the character portraits leave much to be desired - very amateurish. Definitely turned off the music right away, but the sound effects are fine.
Overall, very well made but, again, ruined by the weird "twins making out" thing.