An extensive guide on how to have fun with this game:
1. Grab Cheat Engine
2. Select this game's process
3. Turn on Speedhack - at least 2; 3 is wild; 5 is funny eye cancer; everything above is borderline unplayable
4. (optional) first level: break a barrel for 100, scan, break another for 200, scan, get infinite money (you have to repeat this for individual characters)
5. hold left click while under level 8 (auto attacks and they're fast as hell)
6. ONLY upgrade your items that give damage (get them to level 10+)
7. one shot bosses at supersonic speed
8. enjoy the H-scenes
(p.s. I can search for my save file if anyone wants it, but trust me, the above is way funnier)