Last Defender

Thanks for the code!

Here's my quick observation:

Clean interface and intuitive gameplay...for the most part, but I'll get to that later.

I like the streamlined, retro-green. The shooter relies on up and down vertical movements against enemies scrolling from right to left. You can't move other than vertically. This is similar to playing Space Invaders along the the y-axis rather than the x-axis. The singularly-colored game interface works surprisingly well. The cool soundtrack encourages an upbeat tempo. Given the game's sophisticated simplicity, this is a cool throwback retrofitted for today's gamers. Good stuff!

A few recommendations I hope the devs can consider:
1. Move the "Pause" functionality to the top-left side rather than the right. Given that we need to tap the screen to shoot, there is a tendency to hit pause often.

2. When the "shooter" appears, perhaps the icon and its "bullets" can be red or yellow. At times it is hard to track the oncoming bullet because it blends in with everything else causing me to inadvertently collide with the bullet.

3. Smoother, more up and down responsive controls

4. Shifting backgrounds as we progress through levels (i.e. images or just plain colors)