The Last Shelter Mission 14 Guide
Here is a spoiler, if you can complete level 14 without breaking a sweat, you can win Mission 15 with 3-stars easily. This mission is much difficult as you need to juggle with several paths, balancing each well otherwise one mistake can end up destroying your defenses.
The key to victory is to boost all defense post in balance, spend when only needed. Also, having 3 Rapid-Fire Miniguns, 2 Heavy Weapons and remaining vacant spots are Rocket Launcher is the ideal mix of towers to defeat most enemies. Apart from that, use shield on towers if you know those big yellow lobsters can reach it before your rockets can take them out.
Mission 14 Final Layout
Mission 14 Playthrough