Implode is a fun, mindless game that you can play for a long time if you're in the mood. If you can get it for cheap, I recommend getting it for two reasons: (1) It's not bad, (2) You're supporting the homebrew community, which can help fund for pressing (or burning, if that's the case) future games.
could this probably mean, that this game does take the full advantage of the uber huge PCE palette and increases the number of colors up to different 482 colors on screen (last stage)? so let's say, this game in that way wouldn't be realisable on the MD? awesome!
There are a ton of PCE games that the MD couldn't accurately handle just because of the amount of colors for the background and sprite layers, probably ones you wouldn't expect too. Same can be said for Genesis games on PCE that use true parallax or something.
Implode is awesome. I like it better than Meteor Blaster which I find to be very hard. I was never a huge fan of Asteroids to begin with.
Meteor Blaster DX was better than I expected and it's a pretty sweet game. One thing I noticed about the difficulty though is that it doesn't seem to truly progress. The thing is, there are like five stages until the background changes and the difficulty only progresses within the five stages but once you make it to a new background/level, the difficulty goes back down and repeats. I'm not completley sure if this is the case, but it seems like it to me. The bosses do get harder though.