added seconds since start, tweaked wall jump, added wall friction and isSliding

main.lua

@@ -17,6 +17,7 @@ function love.load()
 	love.graphics.setDefaultFilter("nearest") -- good pixel
 
 	game = {
+		secondsSinceStart = 0,
 		scale = 2,
 		width = love.graphics.getWidth(),
 		height = love.graphics.getHeight(),
@@ -68,6 +69,7 @@ function love.update(dt)
 	fps_current = fps_history:Push(1/dt)
 
 	current_dt = dt
+	game.secondsSinceStart = game.secondsSinceStart + dt
 
 	if DemoRecording or DemoPlayback then Demo:Step()	end