You cant play this without controller but this game is so GOOD. I bought a controller just for this game XD. I recommend playing on high difficulty cuz achievements and challenging gameplay. I bought it for 10$ no regrets. Awesome platformer with high speed gameplay in lategame. This game have a lot of problems i met some bugs while i was playing but it was rare for me. The biggest problem is sometimes u just cant find the way to get forward it took me a while to get used to it in the beginning. Bosses in this game are insane! Best bosses are Narberal, Entoma, Albedo, and my favorite shalltier she is balanced hard and her fight is one of the most beautiful fights in game in my opinion. I have complete this game on hard diff for about 3.5 hours, i killed all bosses 2 times ^^. Im a big fan of ranobe and anime "OVERLORD" and this game is pleasure for me.