Modify wheel collisions

TODO.txt

@@ -12,20 +12,29 @@
 - maps to make:
   - there should be these maps:
     - compiled in:
-      - standard maps, let's say 10?
+      - standard maps, let's say 5?
       - additionally a few (5?) extremely simple maps, compile time option to
         only include these, for very weak devices with limited block/triangle
         count
-    - bonus maps in the external file
+    - bonus maps in the external file (also 5?)
   - map types:
-    - traveling salesman kind of maze
+    - traveling salesman kind of maze, with fans n shit
+    - city map?
     - some kinda buggy bumpy downhill
+    - dirt map
+    - ice map
+    - boss map
+    - text or picture from blocks?
+    - chessboard from different materials
+    - falling tube map?
+    - grass hills as decoration?
     - something with multiple roads
     - RPG kinda map? could be in bonus maps
-    - some speed map
+    - some speed map (mostly flat to prevent high speed bugs)
     - some (at least partially) interior map
     - something with multiple finishes
-    - U-ramp to build speed and jump up to catch a CP
+    - U-ramp to build speed and jump up to catch a CP (done)
+    - jump through air ring with CP
 - try to speed up the slow culling
 - make a small txt game menual
 - test:
@@ -46,6 +55,7 @@
 
 =========== BUGS =================
 
+- immediately after starting the map countdown seems to be lower
 - the pinch collision test seems to sometimes stop the car e.g. after falling
   from bigger height or when running into ramp at high speed (or not?) - FIX