I'm guessing that this is unfinished because of the time at which you submitted the game. That is also fine! I think what you have here could make some pretty great puzzles where you have to go back and forth to solve it, maybe even with several more flags in different colors that do different things! However, in the state it is in now, it's unplayable. Maybe it would be possible if the flag was on the right side of the character rather than the left, or you could change position of the flag? I hope you'll continue trying!