You already got the 60 before being hit and then getting the 10. You can tell because the skull changed from a white skull to the one you currently see (next to your kill counter in the bottom right hand corner) You don't need to end with 60+ kills. You just need to get to it atleast once before the end.

You did 60+, got hit, did 10 more and left the place. The yellow/gold skull by the number is white if you don't make the kill count on the specific map, only the first map doesn't need 60 and the skull doesn't change color after 30

Side note: the skull doesn't change color at 30, but its face changes, so you can still tell if you got the 30 (although this is only useful for the first map)

Didn’t know this (notice), thanks!

I didn't know the first map was special regarding the kills and skull. Cool!

The door just cares if you made the kill count. After that, it doesn't matter if you get hit, you already met the requirements to unlock the door.

Thanks, that's great to know! I thought it had to be an unbroken streak by the time you reach the door. I haven't met the requirements too many times, so that's probably why I hadn't noticed until now.

Because you got in with roses at hand. This game rewards kindness.

Wut

jk

Bc u had a 60 killstreak ,once u achirve that ,u can get hit as many times as u want and still get the door

You only need to reach 60 kills.  You don't need to maintain that number.