This is great game :D

Needs severe reworking with the numbers. Saved up for a LONG time for Small Planet (6 trillion)... guess how much it gave me... 286,000/sec... are you serious? At least I get a new background to look at...

Once the bugs are worked out, this will be a fun game. I played for A LONG TIME, but when I realized that the upgrades didn't make sense mathmatically, it was kind of ruined for me. It would have been a 5, but the game needs to be finished, tested and have everything make sense.

real fun but is there a way to know wath achivments there are to be abel to target them

It is a nice game. Fairly interesting take on the cookie clicker. I like how actually clicking the cookie increases your overal CO2 gain/sec. Good innovation. The graphics are also fine, as is the music. There are just a lot of spelling errors in the game, as well as wrong tool tips. That looks sloppy and should be fixed. But that is minor. What is far more troublesome is the fact that the upgrades are horribly unbalanced. There is no increase in payoff for upgrading, yet the costs of upgrading does grow. Furthermore, moving to a next tier is hardly ever cost efficient. The payoff grows linearly (?) whereas the costs grow more than linear (possibly exponentionally.) A next level is hardly ever worth it. This is further compounded (litterly) by the upgrades. They are heavily focused on the lower levels, meaning you the higher levels are heavily at an disadvantage. Personally I found the Pine Tree to be the most cost efficient.

Here, I crunched the numbers for you:
My stats
Special upgrades:
Level 22 Axe (220% multiplier)

Level 19 Saw (285% multiplier)

Level 17 Chain Saw (340% multiplier)

Level 17 Weed

Level 18 dynamite (180% multiplier)

Level 16 Crystallised CO2 (160% multiplier)

Level 22 'Something' (min temperature 691.398)

Level 16 Gears (80% multiplier)

And the payoff:
Level 51 Leaves
200 / 100.000.000 = 0.000002 CO2/sec. Payback time= 500.000 sec = 138 hours

Level 46 Books
1.000 / 78.000.000 = 0.000013 CO2/sec. Payback time = 76.923 sec = 21 hours

Level 46 Branches
2.800 / 145.000.000 = 0.000019 CO2/sec. Payback time = 52.631 sec = 14 hours

Level 46 Large Branches
10.500 / 267.000.000 = 0.0004 CO2/sec. Payback time = 2.500 sec = 42 minutes

Level 46 Firewood
15.000 / 416.000.000 = 0.000036 CO2/sec. Payback time = 2.778 sec = 46 minutes

Level 46 Briquette
9.000 / 623.000.000 = 0.000014 CO2/sec. Payback time = 71.429 sec = 20 hours

Level 46 Coals
13.000 / 713.000.000 = 0.000018 CO2/sec. Payback time = 55.556 sec = 15 hours

Level 46 Pine tree
345.000 / 4.481.000.000 = 0.000077 CO2/sec payback time = 12.987 sec = 3.6 hours

Level 47 Pine tree
( 16.454.557 - 16.104.460 = ) 350.097 / 5.153.000.000 = 0.000068 CO2/sec. Payback time = 14706 sec = 4.1 hours

Level 48 Pine tree
( 16.804.653 - 16.454.557 = ) 350.096 / 5.900.000.000 (?) = 0.000059 CO2/sec. Payback time = 16949 sec = 4.7 hours

Level 49 Pine tree
( 17.154.750 - 16.804.653 = ) 350.097 / 6.815.000.000 = 0.000051 CO2/sec. Payback time = 19608 sec = 5.4 hours.

Level 41 Flamable Powder
9.000 / 6.545.000.000 = 0.0000014 CO2/sec. Payback time = 714.285 sec = 198 hours

Level 8 Wooden House
29.000 / 2.554.000.000 = 0.000011 CO2/sec. Payback time = 90.909 sec = 25 hours

Level 2 Castle (or Farm)
45.000 / 1.420.000.000 = 0.000032 CO2/sec. Payback time = 31.250 sec = 9 hours

Level 10 Castle (or Farm)
47.000/ 4.343.000.000 = 0.00001 CO2/sec. Payback time = 100.000 sec = 28 hours

Level 5 Forest
42.000 / 4.373.000.000 = 0.00001 CO2/sec. Payback time = 104.167 sec = 29 hours

Level 1 town
129.000 / 66.660.000.000 = 0.000002 CO2/sec. Payback time = 500.000 sec = 139 hours

[note: these are rough numbers, and there are a lot of rounding errors.]

And for the upgrades:
Upgrade Axe to level 23
( 54.782.740 - 53.250.421 = ) 1.532.319 / 3.293.550.772 = 0.000465 CO2/sec. Payback time = 2150 sec = 35 minutes

Upgrade Saw to level 20
( 56.752.864 - 54.782.740 = ) 1.970.124 / 3.297.977.826 = 0.000597 CO2/sec. Payback time = 1675 sec = 28 minutes

Upgrade Chain Saw tot level 18
( 59.140.893 - 56.752.864 = ) 2.388.029 / 4.878.777.419 = 0.000489 CO2/sec. Payback time = 2044 sec = 34 minutes

Upgrade Weed to level 18
( 59.140.893 - 59.140.893 = ) 0 / 58.113.073 = [undefined] CO2/sec. Payback time = [undefined] sec

Upgrade dynamite to level 19
( 59.186.180 - 59.140.893 = ) 45.287 / 226.917.346 = 0.0002 CO2/sec. Payback time = 5000 sec = 1.4 hours

Upgrade Crystallised CO2 to level 17
( 61.515.026 - 59.186.180 = ) 2.328.846 / 23.718.658.417 = 0.000098 CO2/sec. Payback time = 10204 sec = 2.8 hours

Upgrade ' Something ' to level 22
( 62.822.500 - 61.515.026 = ) 1.307.474 / 11.626.122.754 = 0.00011 CO2/sec. Payback time = 9091 sec = 2.5 hours

Hope it helps to balance it better. :)