For the hard badge, if you run exactly horizontally at the start then the bullets miss you and you can get a free kill on the left or right guy straight away - the centre guy doesn't turn around so you can get him second
Tips to get all obstacles in one go:
1. You will need: Aztec Catalog, Fully upgraded ramp (yes I know snowman) and fuel, The chopper, Dark Matter, Balloon Mk.II, and importantly, the Omega Coil. 2. At launch, spam up to begin to get the minimum spring power. Not changing position, this should hit the snowman dead-on. From there, simply point the chopper blades forwards but angled up slightly to destroy the obstacles. When you get near the wall turn and use the balloon to get speed and destroy the wall. (should you somehow run out of chopper fuel then remember even on a one-time release boost if it is on while it destroys an obstacle it will turn off allowing multiple uses. Hope this helps...
Got some mental glitch where the monster i'm fighting is on negative health after I should have killed it. None of my moves do anything and the enemy monster is inactive, but still regenerating hp (as is mine), then shockwave crashed.
Exactly you do! get them all gold and in total there are 30 points (its like saying the hard badge is get all gold but if you do all castles anyway then we will give you 15 of those points because the job is part done).