LD42_pickup_update

public void UpdatePickUps(float deltaTime) {
        for(int i=0; i < spawnedPickUps.Count; ++i) {
            PickUp pu = spawnedPickUps [i];

            // if spawned count down spawn time
            if(pu.pickUp.activeSelf) {
                pu.timeLeftDespawn -= deltaTime;
            }
            // else count down despawnTime (TODO: must also check if collected by player!)
            else {
                pu.timeLeftActive -= deltaTime;
            }

            // despawn if time is up
            if(pu.timeLeftDespawn <= 0) {
                pu.pickUp.SetActive (false);
                spawnedPickUps.Remove (pu);
            }

            // deactivate effects if time is up
            if(pu.timeLeftActive <= 0) {
                spawnedPickUps.Remove (pu);
                // TODO: remove effects
                if(pu is GreenPickUp) {

                } // endif GreenPickUp
                else {
                    if(((RedPickUp)pu).isSlowPlayerDown) {
                        DebuffSlowPlayerDownRevert ();
                    }
                } // endif RedPickUp
            } // endif timeLeftActive

        } // foreach()
    } // UpdatePickUps()