4 stars!
Skill man, just skill.
Nicely done animated background, interesting idea, decent game play.
Overall pretty fun and cool.
Advice, maybe make a timer where enemy's go berserk and add hardcore music when it occurs, maybe make a gun powerup.
Also... lag... why?
I have 8 gigs ram, a wicked processor, and a sick video card via pci-e
Lag should not occur... not sure if it's server side, or internet, but I'm wired via fiber optic high speed.
So don't know man... just plain out lag.
May or may not be my fault, but the point remains the same, you have skill and know how to use it.
Mix it up a bit, maybe add some more stuff and make more aggressive music a part of it to pump me up.
Maybe weapon collection for the Dino instead of shooting flames.
Still very nicely done.
TLDNR
Yes I know.. anyway that's my two dimes worth