Right click the game, go to properties, then go to your local files, and click browse.In the folder, you will find your save files, make sure you have a save created, i dont know if any blank files will show without it.
Right click your save file, and edit it with with notepad.
In here, almost everything in the game can be modified or turned on or off, even achievements, can be modified to "completed:true/false" and almost every other setting in the game can be messed with, if you are interested in testing them all, feel free to do so. In this guide i will only show how to get the basic things.
Your level will not change if you only change the experience number, as the variables of the game are all pretty much independant.

Here you can change the experience, level, and amount of money. Most of them are not capped so dont worry about high numbers.

In this section, you can change the tower heatlh, and the amount of lazer energy you will get.
note that some variables reset when you enter a new battle or things like that. Money and levels, should not move. But things like mega health and lazer energy did reset for me after one battle.

The first float value here is the etherium, its the only one im sure of for now, so dont copy paste what values i put in for everything since i dont know what it does yet.

Thank you for reading my guide, hopefully this helped you. Have fun with steampunk tower 2.