Probably known glitches, but here's a few screenshots:
http://cloud.steampowered.com/ugc/558689934247062665/00E59973223C650D5EB...
http://cloud.steampowered.com/ugc/558689934248143927/89DEA09E21AD041CD6D...
http://cloud.steampowered.com/ugc/560941562636580479/1381786757C1E1397E7...
http://cloud.steampowered.com/ugc/558689060850230401/3C91B9EE09F7A539BC0...

I was locked out! (I've NEVER had this happen before)
http://cloud.steampowered.com/ugc/559814891149283753/909ED4C5F587A2D54B6...

Here, the enemies disappeared:
http://cloud.steampowered.com/ugc/558689921268218955/9860FDD7C7D84E7CE8A...