I've been running through all the levels doing the All Goons Bare Feet, and I think level 15 includes the sniper that (as far as I know) is unkillable. Haven't seen a run on that level that gets 29/29, anyone know for sure if that's the last one? And if it is, can you confirm that they're unkillable?

So I was confused about this too, seeing this comment I tried and came up one short as well, since the sniper goon and all, so I went to confirm if there was any runs already submitted and one record has been set about 2 weeks ago, looks like you defeat the sniper goon by kicking a tnt detonator looking thing at the end of the level and that blows up that tower, I didn't even try to kick it until I saw the record, glad we both know now though!

I hesitated to answer because the message was old but yes indeed I confirm what Dylenoyer94 said, you have to kick a detonator. you can watch my vod on 'bare foot all goons 1-15.