It depends on the game and the platform.
Know your audience, know your distribution platform. And know your level of professionalism.
You would need an audience to get revenue from ads. And if you had an audience you would either be on a mobile store for ads or you would have pay what you want on Itch or your game would be paid on Steam.
For amateur/hobby level games and most professional "indie" games as well, pay what you want on Itch give best opportunity. But opportunity does not mean success.
Unless you are a professional game developer, you should not expect to make any money at all. Sure, it is nice to get a tip here and there. And most "developers" here are developers in the same sense as writing your own blog makes you a published author.
So, for your game, if the decision is between free, paid and ads, I would probably just play a different game. And one that is playable in the browser at that. But this has also to do with the fact that I do not like platformer games, nor pixel games very much. And I would not have the patience to download 300mb demo of a game that looks like it should be a 30mb browser game.
Seriously, what is up with game sizes these days? It would have been a 5mb flash game some years back.