5 hours- for 1 five star speed upgrade- is crazy- I'm in pain..
But other then that, I love this game. The music and sound effects are great, I love how well the textures are, it's like each piece was actually given love and attention- unlike some 40 million$ games that have come out recently- This was a great 30-75 min long game, that really brings me back to the good old days of Coolmath games. and I liked the little references in sprites and weapons. all and all, fun times- but I'll be grinding for at least another 5 hours XD