DISCLAIMER: I am EU (ES)
The Humble website lists this restrictions:

Strider
RU+CIS Exclusive Countries: AM, AZ, BY, GE, KZ, KG, MD, RU, TJ, TM, UZ, UA
RoW (Blocked countries): AM, AZ, BY, GE, KZ, KG, MD, RU, TJ, TM, UZ, UA

So i guess this is restricted to RoW, but i can't set that in the region restrictions of this giveaway. Pls take notice that maybe this key does not work if you are entering from other than EU

Cool game. A little floaty for my taste, but very nice looking. Cheers and good luck