Level 17 cannot be done in the way it is done in the video walkthrough. The fire rate of the cannons is much higher in the game than in the video. It might have something to do with the computer configuration, but it definitely cannot be done...
For the hard badge: after take off, go handstand as short as possible, then handstand again, but hold it, steering the shopping cart as high as possible. When at top of jump, start doing back flip (you're still in handstand). Release handstand just before landing.
Should give you an easy 1800 points.
The bonus from the Minotaur Commander (and others like him) doesn't work. At least not for me on the Astral Drakes.
Just wanted to let you know...
Also... Why can't I target my own creatures with damage spells that read "Target creature"? Shouldn't they just say "Opponent's creature" instead, then? There are plenty of situations where I would like to get rid of one of my own creatures, but can't, because it can only target enemy creatures. Same goes for healing spells: why can't I heal an opponent's creature? Sometimes it benefits me a lot, but I cannot use it...
How do I get the different breath types? After I got the plant thing completed, I couldn't get the other ones, as all the things I ate showed the leaf...
Too hard, if not impossible to dodge all the bullets. Grade A should be if you don't die, not if you don't get hit. Furthermore, the weapons are not really capable of dealing with the bosses in sufficient time. It takes forever to kill the bosses, making it impossible to not get killed a couple of times when the screen gets flooded with bullets.
 "Ping Pong"){kind=icon}
 "Next, Please!"){kind=icon}
 "Shopping Cart Hero"){kind=icon}
 "The Space Game: Missions"){kind=icon}
 "Backyard Monsters (removed)"){kind=icon}
 "Spectromancer: Gamer's Pack"){kind=icon}
 "Super Energy Apocalypse"){kind=icon}
 "The Heist"){kind=icon}
 "How to Raise a Dragon"){kind=icon}
 "Tower of Greed"){kind=icon}
 "Red Fluxion"){kind=icon}
 "Picma"){kind=icon}
 "Plazma Burst: Forward to the past"){kind=icon}
 "When Penguins Attack -TD"){kind=icon}
 "SkyFyre"){kind=icon}
 "Deep Forest TD"){kind=icon}
 "Coy Card: Memory"){kind=icon}
 "Canabalt"){kind=icon}
 "The Next Floor"){kind=icon}
 "Multitask"){kind=icon}