Anyone Else Playing Space Waves?

I recently started playing space waves, and I was surprised by how challenging such a simple game can be. The controls are easy to learn, but navigating through tight gaps and avoiding spikes takes quite a bit of timing and concentration.

I like that each failed attempt feels like a chance to learn the obstacle pattern and improve on the next run. Some levels that look easy at first can become surprisingly difficult once the speed picks up.

For anyone who has played it, which level or section gave you the most trouble? And do you prefer playing with the keyboard or mouse?