fix game

pkg/physics/physics.go

@@ -56,11 +56,23 @@ func ApplyPhysics(
 	state *PlayerPhysicsState,
 	input PhysicsInput,
 	currentSpeed float64,
+	difficultyFactor float64,
 	collisionChecker CollisionChecker,
 	playerConst PlayerConstants,
 ) {
+	// Schwierigkeits-skalierte Parameter
+	// Air Control sinkt von AirControlFactor (0.4) auf AirControlMin (0.15)
+	effectiveAirControl := config.AirControlFactor - (config.AirControlFactor-config.AirControlMin)*difficultyFactor
+	// Gravitation steigt von Gravity (1.5) auf GravityMax (2.8)
+	effectiveGravity := config.Gravity + (config.GravityMax-config.Gravity)*difficultyFactor
+
 	// --- HORIZONTALE BEWEGUNG MIT KOLLISION ---
-	playerMovement := input.InputX * config.PlayerSpeed
+	// In der Luft: reduzierte Horizontalkontrolle (skaliert mit Schwierigkeit)
+	airControl := 1.0
+	if !state.OnGround && !state.OnWall {
+		airControl = effectiveAirControl
+	}
+	playerMovement := input.InputX * config.PlayerSpeed * airControl
 	speed := currentSpeed + playerMovement
 	nextX := state.X + speed
 
@@ -96,8 +108,8 @@ func ApplyPhysics(
 			state.VY = -config.WallClimbSpeed
 		}
 	} else {
-		// Normal: Volle Gravität
-		state.VY += config.Gravity
+		// Normal: Schwierigkeit-skalierte Gravität
+		state.VY += effectiveGravity
 		if state.VY > config.MaxFall {
 			state.VY = config.MaxFall
 		}