Hello everyone, nice to welcome you on our site, this page even has Level 15 answers. I enjoy it =D
Level 15 - EGLFUEL
The answer to this puzzle is:
Words: FUGLE, LUGE, GULL, GLEE, FELL, FLEE, FEEL, LUG, ELF, EEL, LEE, LEG, GEE
Bonus words:
FUGLE, LUGE, GULL, GLEE, FELL, FLEE, FEEL, LUG, ELF, EEL, LEE, LEG, GEE