This is a weird one. In section one, on this part right here:

Sttb legacy 1

When Mario approaches the corner of the platform, he will auto run and ZOOM off the edge the platform.

I have tried everything I can thing of to explain it, but I can only figure it is some baked in SMBX bug with that particular block and the autoscroll.

I found it works find just to replace it with the regular curved edge, like so:

Sttb legacy 2

  • Also, your big sun dude dies when it hits the pipe, so it's wierd to hear the death sound and you can sometimes see the spike-top flying off the left side of the screen.