This is an interesting premise, one that could totally have potential if it was delivered with more charm. The opening cutscene is very neat, but although the destruction is there, and the art is good, but the rest of the game could have gone such a long way too if the maps were given some life that would react to the chaos.
The scoring system is another big problem. You lose out on points for burning things down, which feels counterproductive, and as the rest of the comments have mentioned, made it difficult to progress through the first level.
If you want to prevent players from immediately going ham, it has to be clear why they are being punished. (burning down the whole map feels like a job well done, so why is it not enough?)
If it could have been fully fleshed out, I could have seen it turn into a game where you have to wait for the perfect opportunity to cause the most damage at once, or else you ruin it, but it would require a lot of AI shenanigans that I'm sure you didnt have time for.
For what it is, though, it's pretty well made, it works and it's more than playable. You already show potential as a dev, so keep it up!