Ok so here are some changes that would be nice:
1. Add a cooldown to placing traps so you can't spam them and add a maximum of 3 traps per player.
2. The traps should be placed where you are aiming, but only on the ground and in a certain distance.
3. If you aim at a trap and you say /placetrap you should get that trap back.
4. Play the close animation after someone steps in the trap.
5. Instead of using FL_FROZEN use set_user_maxspeed so the player is still able to attack.