We have a high scores subforum that has been collecting dust, so here is my contribution.
System: Sega Genesis model 2; no cheats, no save states, no speed/slow hacks (although you can pause and still see the screen, so that's a built-in "slow" option)
# Jewels: 4271
This high score is more an accident than anything. I tried playing Columns once before and hated it because pieces couldn't be turned and my Tetris/Dr. Mario mentality couldn't wrap around it. Now I'm working my way through my Genesis games and decided I'd play this until I died and then throw it back on the shelf. The speed really started picking up around level 20 and I thought that's as far as I would go. Was fairly shocked when I got to level 30, 40... then couldn't decide if I had the knack for it, if I was really really lucky, or if the game was really that easy. After playing for at least a good half hour I decided to end it, so started throwing pieces wherever and filling the screen to end the game. The way my luck was going, it looked like I might have been able to continue indefinitely as long as I put in conscious effort.
So I'd really like someone to try to beat my score, if only to confirm that my high score was luck or if the game really is that easy.
Currently playing: Phantasy Star, Pokémon Black, Gran Turismo Sport You can call me Dr. Fibb