Thanks to AlexFili for letting me know the sources for Tales of Dagur did not work on the latest devkitPro.
Therefor I have released a fixed version of the source.
For the interested ones, here is a list of what is fixed:
ARM7’s makefile is changed to produce binaries in Thumb mode to reduce the code size to fit the 64k limit.
The ToD engine had a bug enabling effects before switching to a level. This caused the level handler to crash when loading the first map.