Use any hex editor apps that are available for android and change the value of HEX Dword to any amount you want.
Score HEX D60758A3 Dword
If the codes doesn't work, it is possible that your android version is not compatible with the code I provided above.
To do it manually, increase your score in Deep Under the Sky that is greater than zero. Press pause and use search function in your hex editor app, enter your current score value in Deep Under the Sky and search for it (choose DWORD). If you see a long list of results, just repeat the process until you get 1 result only.
Tips and Tricks
If you see a small blue orbs, use it as your guide especially when you use it for squid launching.
In later levels keep your seedling going for as long as possible for your first shot or two in order to scope out the level.
Use the indicator of your last run to tweak the timing of your ability activation in subsequent attempts.