That's a great twist on the cheat code system. It's pretty interesting. That's like a game inside a game. Go for it. Make it more complex and it will be a fantastic videogame. Maybe even focus on a cheat system to beat levels that are impossible to beat from the start or make the cheat codes that will feel useless and yet be actually useful but only for a selected levels/encounters. Unfortunately, I feel like a lot of people may skip on this as it's not playable in a browser, while this one is actually a great entry.
P.S. Yoyogames (Well… Opera) are giving free subscriptions to those who own a license, I got like 41 months of free indie license, maybe if you have a similar offer it will be possible to upload a html5 version.