Wow, that's great! You had the flamethrower in the original, right? This one looks even better than the original weapon (which was already pretty cool).
Thanks.
Yes, I had it in the original version. (it was just a modified Bubbler-Machine Gun hybrid, though)
This one has working physics and isn't overpowered. And isn't based on the Bubbler.
Levelling up affects the damage (it gets only +1 damage per 8 attack points, but it's a really spammy weapon) and how long the projectiles last before disappearing.