There are a bunch of smaller-bigger errors in this hack that you definitely should fix.
Also, I recommend you to make your levels at least a bit longer. Most of the levels took about 30 seconds (or less) to beat.
- You can die in the title screen.
- the "Bob's Adventure" letters look a bit weird with these colors, I suggest you to change them a bit.
Level entrance FG/BG index is way too low. This picture
I know I'm not supposed to, but if I forget to bring the P-Switch here, I can get stuck.
- Stacked Munchers are a no-no.
- Also, the vine should connect to something (I think).
The wing of the bouncing Koopa is a bit glitched there.
The rest seems to be fine, good luck on fixing these errors.