Fuel suckers is way to powerful. It should cost about 10x as much as it does right now. Infinite flight should never be possible it gets boring. Also I think the platforms are too dense now. HHL1 was better. It's too easy now.
I can beat the toughest levels with an unupgraded virus. The games too easy, the enemy needs to go for the empty cells faster. (or have neutral defenders of empty cells like nanowars did.)
So so, but not great. Some real differences after the adult dragon would be nice. More stuff like the zombies. If you burn the town people should run screaming from you.
I wish the into didn't start until you push a button. If you don't sit there staring at the loading bar it starts with no way to replay it and you miss it easily.
I thought it would get boring, but carefully picking upgrades for each reactor made it fun and interesting. Good job keeping it interesting and a nice steady learning curve. 5/5
"Currently unbeatable for me.. for some reason my game is bugged, and the level where you have to have 3 guys collide on the explosive box is broken. :(" Same for me, stuck in exactly the same place. They won't go up the ramp, they turn around on one pixil for no reason.