An early preview video showcasing the various differences between TSRP and TSRPR in the first level of the game; "Echoes of Birabuto", which is a remake of the first stage of "Super Mario Land".
This video showcases the 3rd level of the hack,
called "Mole Ruins #2". (...even if there are no moles!)
It's played on the Super ZSNES v0.1 emulator
which comes with some inbuild-enhancement options including widescreen support for SMW.
This video showcases the 7th Boss Level, which is "Disturbing Castle", a stage in Bowser's Valley.