Really strange in fact. There's nothing you can crash on and die in the last part of Level 1, there's literally non a single object around, beside the coins and the platform, the only thing I can think that may be causing that bug is that the collision box was detecting a collision with the frame edge.
I'll keep trying to replicate that in case there's some kind of error in the collisions code, thank you so much for your feedback it helps a lot!