Robot gave me candies on each special usage. It helped me a lot to stack upgrades between each wave. I finished the game with robot + cat + ninja + ninja.
Some feedback: This game does a poor job explaining all the UI items. What is that "scrap" thing at the left? What are the "current" numbers in the craft window?
After hiring all heroes, all that is left is leveling them up. I'd like to have some "overview" mode that shows all heroes and level up buttons, so that I don't need to scroll anymore.
Game is a bit glitchy, and it gets extremely slow over time. Playing survival is a test of patience with less than 5 fps. And, when we finish the story mode, all upgrades are gone.
Poor physics, specially of the enemies. They move related to the kid, instead of the earth. Looks bad, specially the rockets. In addition, the aim is not correct, on space the bullets go precisely below the mouse cursor, instead of the center.
Although the inclusion of bonus levels was neat, they are a bit too annoying and frustrating. Bonus 2 is okay but it is annoying to keep walking and jumping to the other side. Bonus 3 has a simplistic and boring gameplay. Bonus 4 is just confusing.
Excellent graphics, good gameplay. However, the puzzles have too many "A-ha!" moments. Having more levels with a more gradual explanation of each mechanic, and how each mechanic could be combined into bigger things, would lead to a more natural learning and progression, and lessen the need of a walkthrough.
 "They Took Our Candy"){kind=icon}
 "Take Something Literally 2"){kind=icon}
 "Moon Waltz"){kind=icon}
 "Hook"){kind=icon}
 "Building Rush"){kind=icon}
 "Auto-Attack!"){kind=icon}
 "City Siege 2"){kind=icon}
 "Where is 2010?"){kind=icon}
 "Clicker Heroes"){kind=icon}
 "Quantum Of Light"){kind=icon}
 "Fixation"){kind=icon}
 "Arcanorum"){kind=icon}
 "Billy the Pilot"){kind=icon}
 "Cardboard Box Assembler"){kind=icon}
 "Qoosh"){kind=icon}
 "Pursuit of hat 2"){kind=icon}
Fixed :)