aligned rc3 world to rc3.world and corrected some words in play.en.md

docs/play.en.md

-HowTo play rC3 world
+HowTo play rC3.world
 ===
 
-This small tutorial is intended to give you a quick overview and some recommendations for the best rC3 world experience.
+This small tutorial is intended to give you a quick overview and some recommendations for the best rC3.world experience.
 
 ## Rules
 
@@ -11,15 +11,15 @@ Please be excellent to each other as well as our infrastructure. The software fo
 
 We will reserve the right to ban participants not behaving excellent.
 
-### Fotopolicy
+### Photo policy
 
-As usual on CCC events, the foto policy also applies to the rC3 world. If you take pictures or screenshots from the world be sure to ask everyone in the picture or not include other peoples faces and / or nicks.
+As usual on CCC events, the photo policy also applies to rC3.world. If you take pictures or screenshots from the world be sure to ask everyone in the picture or not include other peoples faces and / or nicks.
 
 ## Recommendations
 
 ### Hardware / Devices
 
-You'll need a computer or at least some device with a hardware keyboard. A Tablet with keyboard seems to work.
+You'll need a computer or at least some device with a hardware keyboard. A tablet with keyboard seems to work.
 
 As rC3.world is an interactive multiplayer gaming experience camera and microphone are recommended. However you don't need it to play, but interaction with others will be boring without them.
 
@@ -33,7 +33,7 @@ You can walk around using the cursor or WASD keys. Hold shift to run.
 
 ### Zooming
 
-You can zoom out and in using Ctrl +/- to get a batter overview over the map, but things like controls, jitsi rooms, .. will scale too.
+You can zoom out and in using Ctrl +/- to get a better overview over the map, but things like controls, jitsi rooms, .. will scale too.
 
 ## Interaction with others
 
@@ -41,26 +41,26 @@ The world consists of different maps that may include interactive parts like web
 
 ### Websites and Jitsi Rooms
 
-Websites and Jitsi rooms will open in an half-screen overlay on the right side of your browser window. For external websites we use a dereferrer asking you for persmission, if you dont want to be asked every time just use the "remind me in 10 minutes" button.  
+Websites and Jitsi rooms will open in an half-screen overlay on the right side of your browser window. For external websites we use a dereferrer asking you for permission, if you don't want to be asked every time just use the "remind me in 10 minutes" button.  
 
 ### Audio
 
-In some areas an audio player will pop up in the upper left corner and play sound. This can be short sound snippets as well as audio streams. There's a mute button on the left, if you dont want to listen to the audio. By default the player will decrease its volume roughly 50% if you join a group conversation, if you don't want that to happen you can disable the feature with the button on the right.
+In some areas an audio player will pop up in the upper left corner and play sound. This can be short sound snippets as well as audio streams. There's a mute button on the left, if you don't want to listen to the audio. By default the player will decrease its volume roughly 50% if you join a group conversation, if you don't want that to happen you can disable the feature with the button on the right.
 
 ### Group conversations
 
 If you meet other players, you'll join a group conversation sharing your camera and microphone with them. Group conversations are marked with a white circle. They can grow up to 4 participants, afterwards they are "full" which is marked by a red circle.
 
-As group conversations are based on peer-2-peer technology, your ip address will be shared with other participants. If you dont want that to happen be sure to disable group conversations or use a vpn.
+As group conversations are based on peer-2-peer technology, your ip address will be shared with other participants. If you don't want that to happen be sure to disable group conversations or use a vpn.
 
 #### Disabeling group conversations
 
 If you don't want to use this feature you can disable it via the hub.
 
 
-## I dont see a map / 404 / black screen
+## I don't see a map / 404 / black screen
 
-Please check your script-blocker for *.rc3.world, as well as external sites (if you want them to openproperly). If that doesn't help you can take a look in your browsers dev tools / console and check for errors.
+Please check your script-blocker for *.rc3.world, as well as external sites (if you want them to open properly). If that doesn't help you can take a look in your browser's dev tools / console and check for errors.
 
 ### Reporting errors