Super Duper World is a difficult mostly vanilla kaizo hack designed to test your skills and sometimes, your patience.
The overworld event after you beat Super Cool! is set incorrectly. Making it impossible to finish the game because you can't progress on the overworld. This alone was enough for rejection for obvious reasons. In the future make sure to completely play through the final product to insure everything is working correctly. I went ahead and fixed the overworld event so I could finish the game and give my feedback on the levels.
The hack should be labeled as 4 exits, which is the number shown on overworld after 100% completion.
Yoshi's House doesn't count because you cant beat it, and the final castle doesn't count because it doesn't save. (Same as in the normal Super Mario World)
--River of Tears-- Overall pretty good level. You can walljump over the 2nd half of the level at the midway, which is pretty easy to do because you get a free attempt every life since you have to hug the wall anyways. You can also just jump over the final obstacle in the level after bouncing on the chuck. (The Volcano Lotus part)
A few minor things to mention. Making the player wait at the start of the level is typically not fun for the player. You can take the mushroom out of the level by coming back in after you've beaten the exit and pressing Start-Select.
The ending blind jump is kind of hard to figure out since it doesn't look like a place you would need to build p-speed.
Same deal with the waiting at the start, its not the same kind of waiting as the last level but I found myself dying on the boo ring until it got into a favorable position that made it easy. (its really hard to jump through because it's position changes every death).
There is a lot of issues with sprites going invisible. Ive had the eeries, shells, and moving holes disappear. This is usually an issue with the sprite header, try using different settings to see if things get better.
The ending of the first room was really confusing. It was an easy trick once you knew what to do, but it probably took me a good 20minutes to figure out how to do it since I had to traverse through the beginning of the level every time.
The ending troll was beyond unfair since the screen fades to black and you can't see how to fix yourself from dying to the ending. Having the player hold jump the whole time with no indication is crossing the line when it comes to ending trolls.
No issues with this level.
The only issue I had with these level is the final jump which is extremely tight and confusing. Even just trying the ending with savestates over and over I cant really formulate a good strategy that works every time. Not really a good thing to have at the end of a level since the player is going to have to play the entire thing every time to try something different or get another attempt in.
No glaring cutoff which is good. I like the underwater munchers. Good job on those!
--Title Screen & Credits--
Both of these were unchanged. I recommend at least changing the title to the game's name. To make it feel more like your own game.
Super Duper world is a hack designed to test your skill, and sometimes, your patience. (also it works now) Update: Fixed the after-goal death in the ghost house. I never even encountered it when making the level. Minor changes.
So, the changes in this update were minimal, and doesnt even took care of the things ive mentioned in the comments of the already accepted version.
Honestly, if you plan on updating it, i at least expect to see some effort on actually fixing/improving stuff.