This is a TD game in the style of Desktop TD, clearly inspired by it (the voices on enemies, the tower placement and so on, even the name). There are different towers and enemies, but that's about it. It lacks some features and a quick play didn't show improvements over the original.
 "Whiteboard Tower Defense"){kind=icon}
 "Loondon"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}