It is indeed. There are obviously a few quirks about it, but i like how simple it is.
Also, here's a mockup of how i expect the second boss to end up looking and firing.
Except the actual boss will be shooting out a lot more of the round yellow shots. And it will be aiming that massive laser at you (likely to be instant death if you get hit, but seriously, look at the size of that beem), though with a significant charge time before firing. Also yeah, those are mostly-homing missiles. Chartle says they hurt a lot if you lack shields. :U
Now i just need to get hold of Chartle, because he's been absent from Steam for 4 days.