Interesting game but the "bug" makes it so damn easy.
The "sequential" medal is not broken. But perhaps there is need for a better explanation: Hit 1 of each meteor type and 1 only, by order of appearance. So, with the ORB, absorb ONE brown, then ONE green/red (whichever comes first, then the other) and so on, until you absorb the last one - the spiraled meteor. That will give the medal instantly.