If I had known old games were fine to submit before this little mini-controversy came out (I read what was said in the GMC, but it didn't click that "lax rules" really meant anything goes), then it would've been a lot less work to just add a shader to Spaceslingers and call it a day. Would've gotten me a lot closer to the $1500 than what I ended up doing as well, lol. I definitely think it's weird to host a jam with a good amount of prize money (which almost guarantees people trying to skirt as close to any "boundaries" as possible) and then basically go "no rules lol".
I didn't enter the jam for the money, but it still feels bad that my entry cobbled together in 5 days is going up against games that have been in development for months. Doesn't have the feel of a game jam at all.