This also plays back properly on the latest iPad running iPadOS, in Safari and Firefox. Maybe no one told Apple that Flash is dead!
The ending is slow (though not as slow as Champs run - he explores most of that centre section before deciding to mosey up to the flag! ). It’s quite hard to hit the right point on the flag with the tip of the wheel. The tight curve on the centre ‘core’ makes the physics a bit jiggly.