I think I've pretty much settled on a good game to hack besides Super Mario World, and that's Super Mario Bros. 3. The tools for it are fairly user-friendly, even though there are some things that I still don't get entirely, like setting up pointers for pipe/door warps in levels. With a bit of help from friends on an SMB3 hacking Discord server, I'm sure I'll be able to pull off...
SUPER MARIO BROS. V: THE GAMMA PROJECT
The title screen isn't too different yet. I haven't really checked out the editing utility for it. As you can see from the (c) 2013 Infidelity, though, it uses Infidelity's SRAM patch to enable battery saves, so kudos to him/her for that.
The World 1 Map has also been changed.
Hammer Bros. Battle
Besides graphics, this hasn't been edited yet. I mostly took this screen to show off the new brick block graphics I drew last night/early this morning. Yeah, I'm a night owl, and, despite my Mormonism/Christianity, I don't think it'll send me to hell.
It's harder to get good in-game screens in this game than it is in SMW. In SMW, you can just pause the game to take a screen. Here, pausing renders in-game sprites invisible.
This level almost stopped me dead in my tracks when it came to hacking SMB3 because, in its initial form, it crashed the game. With help from the above-mentioned SMB3 Discord, I learned that you MUST place the variable-height colored block ledges on the ground. I could've used the floating ledges, but I felt those wouldn't have really fit the aesthetic I was going for with this level.
I probably could've timed that second screenshot better. I had to take a hit to get it and just so happened to catch a frame where Mario was invisible due to Mercy Invincibility.
This level also gave me trouble due to not understanding pointers. Edward Rey helped out immensely by setting the pointers correctly so that I could get that second room working.