This European version has 17 levels.

I just finished these, and here are level codes:

l2: BJKTOG
l3: IOPYTS
l4: EJKVYM
l5: LOPAEZ
l6: HJKXIT
l7: OOPFYX
l8: ZYZRSH
l9: KJKDNR
l10: ROPISD
l11: YTUQHI
l12: QJKGXE
l13: TJKKHE
l14: APPSWI
l15: HUUXBV
l16: KUUBMU
l17: RZZJBZ