Hit'n'Run Spin-off Troubles

So, I’m trying to create a new level similar to Hit’n’Run, but with an archer instead. I have what I think should at least be playable, but when I click on the Play button in the editor the load screen appears and the bar fills to about 90% then doesn’t go any further. Does this signify some clear error?

Nice chatting about the level today in the HipChat. Let me know if it’s working again now that we’ve deployed all the fixes.