The hook mechanic feels great! I'd suggest putting a cap to the hook length - I found that if I throw the hook upwards in any direction, it'd eventually hook onto something, pulling me up!

I like how the lava slowly rises and the mechanics aren't bad, but because the grapple was infinite, I could just keep shooting up and hitting a platform very high above me. Still, it was fun and I'd play again.

This is cool, but not challenging, while you can complete the game in less 30 seconds with way too powerful rope.

Using the rope and hook is still fun indeed and theme worked well on this title. I like the idea of collecting the great lava-diamond because of the boss needs. From the map drawing i though i may be able to travel some longer before getting there, but got disappointed while seen i just have to climb once to up;  So actually this first and only level was the level which i want to see as the last.

At least this is a game; imo this feels like a prototype, but on by with art style and by the game idea this is more way to go.