I do keep a lot of old projects but if i do come accross them and haven't used them for ages i just delete them as well. Otherwise i would still have old PHP projects that are 10 years old.
Could be basically everything yes.
Those hacks are usually not changable while playing but easier to do than bytecode changes or decompiling/recompiling. And i only have like 50 hacked Flash games saved on my external HDD. I don't do much hacking anymore so many of them are 5 years old.
That might sound like a hard game to do but i think it really is not that hard. You have your goods that can be bought/selled in towns to a random price basically. Sounds like bunch of arrays for me to get the very basics of such a game going.
You could simply start by creating a very limited version with 2 drugs and 2 cities. The player would be in city 1 and could buy some drugs for the money he has. Then he could travel to the other city and sell it there for a profit. That requires like 2 arrays (inventory, current citys available drugs).
Local Multiplayer with a memory game would mean to make a bigger deck first with at least 8x8 cards but would be possible. And with highscore i meant a local one and not online, which would require me to do some network code as well as have a server to put the database on.
What i really meant was to look for another simple game and i found the original article which i got the idea for making a memory game at first... man that was 6 years ago what the heck!
6 games you must be able to make in less than a day | Emanuele Feronato
I might try to do the next in line here which is tic-tac-toe but i guess i will again take more than a day to do that.
The name implied it would be a theatre with technic as a key component or main theme. Anyways i guess there is a lot of stuff going on in the background of a theatre with lights, sounds, props, etc. Do you do this full time or more like a hobby?