Honestly, to me that's one of the biggest compliments a game like this can get. The idea that it is a little frustrating, but entices the player to keep playing means it has challenge, and that tends to be what makes a game fun, something to overcome. Based on the comments I could totally see that we perhaps made the game just a little too challenging, even so, I'm really glad some are finding the game rewarding when they overcome it. Thank you for your comment, it makes me feel like we didn't miss the mark quite as much as I feared we might have :D
(Also shows the importance of rebindable controls!!!)