About your screenshots: show That first screenshot should not be made from those blocks, I would suggest using another block (and no, I don't mean just use the blue ones), like perferably SMB3 or SMW ground.
The second screenshot is arguable. Why is a metroid background clashing with SMB3 wood blocks? That just doesn't seem right.
The third screenshot is flat and boring.
Not only that, but all 3 screenshots lack any sort of scenery.
If you want me to, I can show you how they should look.
You should really specify what version of SMBX this is being made on, 1.3.0.1., 2.0, or 38A. Because I ran this on 1.3.0.1 and it displayed this:
Also, if this is a WIP project, it should be in the Projects forum, not the Episodes forum. I'm not trying to be mean. I'm sure you're new to this forum and game and probably are struggling to get all this info in your brain, but you'll fully understand soon enough.