Wonder Boy: The Dragon's Trap developer Lizardcube today revealed (via Twitter) that the game's internal dev toolset can be accessed by editing a config file in PC builds released through Steam and GOG.
The secret? Apparently you just find the "Editor=false" entry in the game's Settings.cfg file and switch it to read "true", then hit F while playing the game.
Having easy access to the tools used to build Wonder Boy both affords fellow devs more insight into how the revamped game works (allowing players to seamlessly swap back and forth between the original and remastered assets while playing) and opens it up to modders looking to put their own spin on The Dragon's Trap.
However, the dev team also acknowledged that the tools aren't always easy to use or even complete; in response to a fan question about whether the studio might reuse the tools to make more classic game revamps, a Lizardcube representative stated that "it’s honestly too much of a mess to be considered a reusable tech for anything, tbh. Maybe next iteration will be."
Lizardcube cofounder Omar Cornut has a track record of making game dev tools publicly available, having previously released (and since supported) ImGUI, a free GUI library for game devs that was forged in his time working at Media Molecule.