Thanks for playing! I really enjoyed designing the enemy waves and getting the timing just right.
The in game guide was a last minute addition. I realized I had completely neglected it, and may have panic dumped everything I could think of onto it. I'm started designing a story driven tutorial level, which I'm getting pretty excited about already!
I did worry a little about the padding around the screen being too large, and the overall play area being a little tight. I do believe the padding helps a little as there's no way to memorize a level, so it guarantees you a little reaction room. I guess I could expand it a little more and add some warnings for offscreen movement.