I'm not really sure if you guys "complete" the game in an easier way but here is a guide to beat easily.
First you need Cheat Engine and it is not for changing values, but for applying "Speed Hack", the reason for this is at the start as you don't have any damage or advantages against the enemies you'll need to give the heroine like "high reflexes and speed reaction" to farm more easily, with this you can move around, dodge, attack, grab and escape grabs extremely easy as the inputs you put are more faster technically.
As for the strategy you'll run (with D key and left or right arrow) and/or roll (with S key and left or right arrow) to get near ANY enemy.
When you grab him you have to press S instantly (for the neckbreaker) as it is the most damaging, time efficient and safest of all finishers as it doesn't knock you down and deals a huge amount of damage and knocks down the enemy and others according to your POWER, repeat until it is dead.
To pass the level you have to roll or run (preferably roll) to the right side of the stage to actually get the points gained.
As mentioned before, the grab attacks scalates with your current POWER, so in order to level it, you have to go to CUSTOMIZE and invest 500 points in POWER, keep in mind that the price doesn't change, and don't bother upgrading anything else yet as it is not that necessary.
The total amount of Stages are 15 (except the boss arena), and you can just skip them by rolling.
(FINAL BOSS SPOILER)
To beat the final boss no matter what you do (as far as I know) his running attack always knocks you down and deals a great amount of damage, but in order to avoid that you can dropkick before and fall to the ground so it doesn't hit you.
When the boss gets near, get up and grab him to make the neckbreaker move, and as soon you get up, you need to dropkick him or in any place, as it will do the running attack instantly, repeat all of this until the boss shows the "stun stars" in his head while in the ground, and get near him to finish it.
The first award for beating it is 30k, and then 10k each time you win afterwards.