I like the game and the mechanic of losing ground tiles as you let more meteors through! I feel it would play much better if the meteors had drop shadows or tile indicators, as it's often difficult to tell where they're falling.
They do! If you check the description, that is a bug exclusive to the web version. I'm not sure what causes it, and it was too close to submission too find a solution. I recommend the download version and you'll quickly see it solved!