Gyrom8
I been playing your second level, Trick Shot Temple, and while it is very nice, I found out two big problems with it:
1) You need to have 4 red coins to finish the level, that is fine on it's own, except since I thought the goal was just to kill all the piranha plants, I thought the red coins were like for a secret area that you can get in if you're a pro gamer or somethin', so my first try, I ignored most of them, then got the hand after killing all the plants, and, well, I was ****, because I couldn't go back on the upper floor to get the red coin I missed, so I say that's pretty unfortunate. While it could be just me being a intelligent idiot, my other point bring up a much bigger problem related to that one.
2) If you enter the second floor, lose the power-up on that floor and haven't got the red coin, the level is impossible to finish due to the fact you can't go on the upper floor again, where a infinite source of Super Ball is. Which is kinda of big since you can easily get hit by the Koopa while trying to properly shoot the red coin above, and while there be peoples who will easily beat this section, others are going to get softlock without even realizing it before it's too late, and that, imo, is bad level design.
That all being said, while I did beat this level and in fact, did the section I just talked about without getting hit once. The fact the possibilty of getting softlock is this present make me think it should be fixed for future players sake. All that is needed is a pipe or bill blaster that give you infinite flower super bal on each sectionl, perhaps you can make it hard to get said flower by having a bill blaster throwing into a claw who is above a pit of spike, or put a door at the bottom of the section that lead you back at the very start, which will make you able to to where the infinite pipe flower and let you retry the red coin you might have miss, at the cost of time on the timer , but what I'm getting at is, don't make a level that need a specific power-up/condition to complete and make it so that, if you lost said power-up or can't go back to where you miss something, you have to restart the entire level by reset, 'cuz if your level end up on Endless mode, peoples will have to lost a live to retry (that or they lose a live if they skip it, I'm not sure), and that, that ain't good.
I tell ya all of that because I can't describe to you how many hours I put into my second level, making sure that nothing could softlock if someone did this or that at which point, playtesting is important, and you always need to put yourself into others peoples shoes to make sure you find all the problems within your design, that, or ask others to try it to find the problems in it, which I just did.
In all cases, Hope this help.