The concept is great, the visuals are great, the sound effects and music are good, but I was frankly getting frustrated with the controls by the end.
I genuinely think it would have been better if there were individual "lanes" the player snapped to rather than the continuous free movement currently used. Especially with the slow acceleration effect it became almost impossible to avoid some spines. And just due to the way the visuals are setup, I found there wasn't a huge amount of warning when an obstacle was about to appear. In fact when some of the energy orbs appeared in the middle lane I found it could obscure upcoming spines.
So I never ended up reaching the end of the third stage, I got seemingly close to reaching the bugs head, but each time he blew up the city and after third time I was booted back to the main menu. And quite frankly I just didnt have time to restart from scratch to see the good ending.
Aside from that though everything else about the game is good. Nice job!