I'm very sorry to read such comments but I cannot really do much. Progress is saved to cookie file on your computer. It is not stored on any server or something like this. So when you clear cookies you literally wipe your save. So please, don't forget to export save code from time to time and store it in safe place. Export save button is available in main menu (the screen where you select challenges).
I got all the achievements, but there is still a question mark in the third slot of the page two (above the Bolgyn). Is there an enemy I never saw, or is this question just one of the unanswerable questions of life?
Pistol is far too good with virtually zero reload time when fully upgraded, fairly high dps, and the upgrades are too inexpensive. Generally too easy game with little progression.
 "Get A Little Gold"){kind=icon}
 "SkillQuest"){kind=icon}
 "Keeper of the Grove 2"){kind=icon}
 "Zombinsanity"){kind=icon}
 "Kitt's Kingdom"){kind=icon}
 "Caribbean Admiral"){kind=icon}
 "Gear of Defense"){kind=icon}
 "Pyro"){kind=icon}
I'm very sorry to read such comments but I cannot really do much. Progress is saved to cookie file on your computer. It is not stored on any server or something like this. So when you clear cookies you literally wipe your save. So please, don't forget to export save code from time to time and store it in safe place. Export save button is available in main menu (the screen where you select challenges).