Update README

media/manual.txt

@@ -13,7 +13,7 @@ video games (even indie ones), Licar is completely libre, i.e. free as in
 freedom (meaning its source code and art assets are available for any use
 whatsoever), gratis (free of cost) and its focus lies in being well programmed
 by adhering to minimalism and rejecting harmful "modern" programming practices.
-The game aims to seflessly bring joy and entertainment to all the people that
+The game aims to selflessly bring joy and entertainment to all the people that
 might enjoy it, even those who aren't able or willing to pay and/or watch ads,
 those owning very old and weak computers and so on. It was made in whole by a
 single man as a completely non-commercial program, the development was driven
@@ -51,22 +51,22 @@ game and immediately load a map, which is handy when creating new maps.
 ~~~~~ GAMEPLAY ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 In Licar, unlike in most other racing games, the player always only attempts
-time attacks, i.e. you only race against time with no physical opponents on the
-track with you. There is an option to race against a replay ghost, but that
+time attacks, i.e. you only race against the clock with no physical opponents on
+the track with you. There is an option to race against a replay ghost, but that
 still cannot collide with your car, so the point remains that your final time
-depends purely on how well you drive, opponents cannot spoil your results by
+depends solely on how well you drive, opponents cannot spoil your results by
 crashing with you or blocking your path.
 
 The objective of every map is to drive from start to finish (red octahedron) as
 fast as possible while collecting all the checkpoints (CP, green octahedron)
 along the way (in any order). There is always a target time which you're trying
 to beat in the bottom left of the screen. If you beat the time, you have
-achieved the goal, your replay is automatically saved and your new time becomes
-the next target time.
+achieved the main goal, your replay is automatically saved and your new time
+becomes the next target time.
 
-On the map there can be several different kinds of surfaces with different
-physics properties: concrete, grass, dirt and ice. Furthermore there are two
-special kind of sufaces: an accelerator (a bright yellow/orange one), which
+On the map you can find several different kinds of surfaces with different
+physics properties: concrete, grass, dirt and ice. Additionally there are two
+special kind of surfaces: an accelerator (a bright yellow/orange one), which
 boosts the car's speed, and a fan, which propels the car upwards.
 
 Your run can be restarted at any time. Typically you will need hundreds of
@@ -89,16 +89,17 @@ Here are some tips:
 
 - It's possible to stop the car from rotating mid-air by pressing brake.
 - Similarly, holding down brake in air will slow down the car's horizontal
-  velocity.
+  velocity in flight. This can help aim for a good landing.
 - Tapping brake while steering triggers drifting (if this doesn't work, you may
   be experiencing keyboard ghosting: the inability of some keyboards to detect
-  certain simultaneous key presses).
+  certain simultaneous key presses; using different keys or a different
+  keyboard may help).
 - Look for unconventional shortcuts and tricks, think outside the box, the
   intended or obvious way is very often not the fastest one. The shortest way
   may also not be the fastest (taking a wider curve, for example, may result in
-  longer way but more speed at the end, which usually makes up for it).
-  Sometimes there exist very crazy shortcuts that the map author overlooked,
-  always look for them.
+  longer path but more speed at the exit, which usually makes up for the longer
+  path). Sometimes there exist very crazy shortcuts that the map author
+  overlooked, always look for them.
 - Minimizing air time helps, don't jump if you don't have to, maintaining
   contact with ground allows for acceleration whereas in air you're losing
   speed.