lotsa fixes:

- fixed obstacle collision and death on obstacle spike
- moved player move into separate loop after other collision checks
  are done
- fixed level setup, generation and selection
- added test levels for obstacles

systems/obstacle_system.go

@@ -52,7 +52,7 @@ func (system *ObstacleSystem) Update() {
 			playerposition := (*Position)(system.World.Get(player, posID))
 			playervelocity := (*Velocity)(system.World.Get(player, veloID))
 
-			ok, newpos := playerposition.Intersects(obsposition, playervelocity)
+			ok, newpos := obsposition.Intersects(playerposition, playervelocity)
 			if ok {
 				slog.Debug("bumped into obstacle", "obstacle", obstacle)
 

systems/player_system.go

@@ -36,7 +36,7 @@ func (system PlayerSystem) Update() error {
 	query := system.Selector.Query(system.World)
 
 	for query.Next() {
-		playerposition, velocity, _, _, speed := query.Get()
+		playerposition, velocity, _, _, _ := query.Get()
 
 		if !velocity.Moving() {
 			switch {
@@ -71,14 +71,19 @@ func (system PlayerSystem) Update() error {
 				}
 			}
 		}
-
-		playerposition.Move(velocity, speed)
 	}
 
-	system.Particle.Update()
+	system.Particle.Update() // may set player position
 	system.Obstacle.Update()
 	system.Collectible.Update()
 
+	query = system.Selector.Query(system.World)
+	for query.Next() {
+		// move player after obstacle or collectible updates
+		playerposition, velocity, _, _, speed := query.Get()
+		playerposition.Move(velocity, speed)
+	}
+
 	return nil
 }