I took a look at Tinkle Pit a few months back, and recently I've tried tackling it again to see if I can't get that wonky Level Select working. While I've made some progress with that (maybe?), I also stumbled across some interesting name substitutions in the High Score Entry screen..
Rezon is a fun little shooter with a couple interesting leftovers (maybe one is an easter egg?). Sadly, neither finds are as amazing as the game's ending.
I seem to be running into this a lot lately, where standard test mode options are disabled or missing from test menus. Honestly, while it's always gratifying to dig out unused code and make it dance, these finds are kind of boring. But at least this game has some hidden developer credits. Those are always interesting!