This table should work for latest steam version at the time of writing this post. v1.0 i suppose.
Options
Money Infinitum
Max Level
What max level does is upgrade your turrets or basically anything that you can with U button to maximum level. To see it take effect, just select the upgrade tool and hover it over turret/any item and it should be upgraded to maximum level.
Have fun. Made upon request of Socker Bopper who kindly gave me the game.
PS: +rep if you like or not, whatever makes you happy.
How to use this cheat table?
Install Cheat Engine
Double-click the .CT file in order to open it.
Click the PC icon in Cheat Engine in order to select the game process.
Keep the list.
Activate the trainer options by checking boxes or setting values from 0 to 1