At first i was overwhelmed by the increasing amount of enemies.
It took me a while to realise that you can use the platforms to remove them. The floatiness of the grappling hook made the timing of this very difficult, but it adds a nice unique challenge.
Linking this form of combat with the continent building is awesome. You have to position yourself in a way that causes enemies to move to the position you want to build in while also moving the platform there without it colliding with the island.
The only thing that bothers me a little is the enemy spawning/movement. They can come from any direction at any speed and you'll have to be prepared to dodge them. The fact that they can spawn inside you doesn't help with being able to plan ahead.
Apart from that it's a great concept and a good entry overall.