Got a 99 not too long ago myself, diving into the library has been pretty great.
I'll second the recommendations for Slymoids and Henhouse, both are great. Henhouse takes a little time to really get going but once it does it's frantic and awesome.
I'd also suggest Treasure Island, Moon Mine, Ambulance, Meteor Belt, Bigfoot, Fathom, Picnic Paranoia and Space Bandits. Tunnels of Doom is great if you have a means to load the dungeons. It's a good bet that Parsec was in that initial batch of games you tried, but it's worth snagging a copy if it wasn't.