Really enjoyed this game! Played till the end. Lots of great designs such as the box and a good feeling difficulty curve, and there are definitely room to expand on this. Also appreciate the details such as the select box shrinking as you move out of the play zone -- really neat touch! One idea could be that instead of making the time a limitation, which wasn't really forcing me to take risks and add attack to the enemy, maybe consider making it a resource, say player has x amount of time in total for the entire level, to achieve a similar goal but make it more strategic and create some split-second decisions.