Walk using the left & right arrow keys. Press the space bar to cast a spell. But be warned: If you cast a spell on the goblin, he will turn into a dragon, & a bossfight will begin. Instead of normal Super Mario Bowser bossfight music, the background music for this dragon bossfight is the Hisstocrat bossfight theme from 3D World. Attack the dragon with your wand. When it touches the magic wand, he takes damage. After 3 hits, it will be defeated.
I took the looped version of that 3DW bossfight BGM from my 3rd dance party program, clipped every part other than the beginning of the song, made it so that when Bowser appears, the beginning of the song plays, & then the looped version plays to make the song into a loop.