The powerup filter is necessary though, since level are submitted with the fact that you start out small. For example, my vldc9 level, before I updated it, was completely broken without the powerup filter. It used a springboard glitch with the pea springs, and the glitch becomes different depending on whether you were small or big. So I designed the first "portal" with the idea that you would be small, and the rest with the idea that you could be small or big. I went back and fixed it though, in case for some reason the filter was taken out of the final collab. The point still stands though, the filter is necessary.
Originally posted by Losoall
I think it'd be nice to have it possible to unlock a level of the player's choice in world X for every set number of normal levels completed.
This seems like a good idea too. Maybe, 25 exits unlock one world x level, 50 exits the next, etc. Ruins the surprise of world x though, but at the same time, if world x is as... average as in vldc9, it is kinda a letdown to play the "best" levels in the contest, then go to world x. But we also can't always expect the judges and staff to make levels even better than the top 10 entries, unless you're S.N.N. of course. Don't get me wrong, vldc9's world x was cool and a fun time, it was just.. a lot of work to unlock I guess?
As far as dragon coin rewards go, something that is simple and easy for the person compiling the collab to implement, and nothing that really changes gameplay. Kinda like how, after beating TLOZ Wind Waker, you can play again in Link's pajamas. Basically, after getting all the dragon coins in the whole hack, you're rewarded with something cool and silly that makes you feel a little accomplished for spending days of your important life collecting hundreds of dragon coins. You shouldn't something huge or game changing only unlockable after every dragon coin. Most real games do this the same way too. Look at DKC2, it takes a certain amount of kremkoins to unlock each level in the lost world. It's a secret unlockable world, but is still accessible without exhausting the entirety of the game, 100% completed. In fact, if you actually take the time to collect every single collectable in the game, like the K-O-N-G letters, you aren't rewarded with much.