A mod for Wario Land 4 that adds a warp to the start of every level that sends you back to the end of the level, but rewarding you with several diamonds. You can go around levels however many times as you want, until your time and score runs out.
Thanks to SSP for helping with patching the respawn of the diamonds.
Database match: Wario Land 4 (USA, Europe)
Database: No-Intro: Game Boy Advance (v. 20210227-023848)
File/ROM SHA-1: B9FE05A8080E124B67BCE6A623234EE3B518A2C1
File/ROM CRC32: D6141609