Not really sure what to do nor what the mechanics are.
It seems you're supposed to go from city to city and destroy all of them, and you also have a tractor beam that doesn't seem to be doing anything, but in most levels I played you can't get to the end without running out of power.

It's a good concept for the game, along with good graphics and the beginning of a overall theme for the game, but as @spliter said, it's a bit difficult to see what the exact goal is, or more specifically what challenge there is to overcome. I think if you had to complete the level by destroying a certain amount of the city (or all of it) without running out of power, and your movement was somewhat more restricted, then it would genuinely work really well. Please don't be disheartened though :grin:, if you made a post Combo version, you'd have yourself a really good game (potentially one that might do really well on mobile). Or even if you don't, any entry into LD helps to improve your skills. Well done, no matter it's quality you should be happy to have completed a game!