Thanks for trying it out! The way you solved it is perfectly valid by the current game rules, but I know its a bit unsatisfactory as a puzzle design sorry.
Level 6 is a bit of a casualty of the game design changing from more action focused - you have to place the last beecon after he's already moved over the square. On a redesign I would tighten up the puzzle designs, the ideal design is that you can place all the beecons before he starts off.
Below is the solution - but the beecon opposite the exit you add once he's past.
