Well, I found your problem.
In the Animation Settings
you need to check "Enable original game tile animation" (First checkbox) that causes the BG to glitch up a little though.
Seeing as you probably don't want a glitched BG, you should either change it, so It won't need the glithed tiled anymore, or you learn how to make custom animations, (there are planty of tutorials here) and insert cutom animated coins in place of the original.
Edit: If you want the flashing animation of the coins back, you'll have to check the second box in
Also, it's not that all your Layer 1 tiles are glithed up, that's just doe to the ExGFX you inserted with
in the FG1 slot. Couse that's where the common tiles like pipes and such are stored. Putting a different file there will of course glitch up the looks of most objects in the "Standard Object" section. (has nothing to do with the coins though)
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