There seems to be a bug with the gamestate not properly resetting when you start a challenge after you got the "gain 1% of prestige diamonds per tick". I wait a while to stockpile a ton of diamonds and then start a challenge, which almost instantly completes. If I don't wait for diamonds to build up this does not work. (i.e. if I can complete a challenge that requires 1e1600 coins, while I can barely make 1e800 without building up diamonds beforehand). This makes it relatively easy to finish challenges, which I assume is not intended.
I like the game btw:)
@KainXinth: Actually it shows exactly how far along you are... although it's based on the exponent of your antimatter. You could say it's on a logarithmic scale.
Far better at gauging your actual progress towards the goal than if you did it with your absolute values (and spent ages at low percentages and seconds on the higher percent ranges)
That slots thing is more annoying than useful... never once you pick some treasures up you have to play all of the credits you have...
Otherwise the game's very good
4/5
I just tried the game and managed to make every Coffee/Muffin perfect, but still i didn't get the required 35... so something's probably wrong;)
Until that gets fixed 1/5
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