I am not the best fan of just grinding runs. Time=money. Not tested with achievements (normally, should not impact them)

1.Navigate to
\AppData\Local\The_king_is_watching_steam\Release (it is located under your user directory)

or

\%UserProfile%\AppData\Local\The_king_is_watching_steam\Release

2. Create Backup of savedata.dat

3. Open savedata.dat with text editor (like Notepad, Wordpad etc)

4. Currency values are located under
"meta_resources":{
"star":XX.0,
"meta_crystal":YY.0

You can put desired amount of resources instead of XX.0, YY.0

5. Save your file

You can do the same with challenges and metaprogression (they are both located under the same folder)