[Timothee]

I could see two issues:

- The first square you end up in might be closed. So it's hard to know what's going on since the keys don't seem to respond (it took me some time to realize that)

- The walls should be shared between adjacent squares. Right now, one wall can be made of the right border from one square and the left border of the square on the left. Which means you can lock "people".

Kind of fun though :)

[dougp]

Thanks, Yeah I should have guessed that people would try and trap people. That seems to have worked out on its own as every wall near the start has been vaporized now.