After much longer than intended, I've finally released v0.2.1! It's a bigger step forward than it might appear, as I spent a lot of time laying the groundwork for expanding the game. Some of the highlights of this release are:

• A few new enemy ships and new more randomized spawning behavior. This still needs more work to be properly balanced. I've got a small system to simulating lots of battles between ships to try to define a reasonable "ship value" that can be used to compare various ships against each other. It's a really hard problem, though!
• Various new ship and modifier tiles. I feel like the ones so far are pretty run-of-the-mill, but I think the structure is there now to start getting wackier.
• Overhauled UI. I still think it needs another pass or two, but it's definitely now much closer to what's in my head.
• New fancier background art. I spent way too much time on this. There are now procedural planets with moons, and nebula of various densities and colors. Still some more to add here, but it's on hold since it's just fun non-gameplay work.
• Added a couple of unlockable tiles. Again setting up the structure for bigger things here. There are intended to be a lot of unlockable tiles and other things, and these first two are mainly a test to make sure that's all working as expected.
• New "ability" tile that can be manually triggered. I'm a little unsure how I feel about this one. It's kind of fun having the extra input, but at the same time I really love games where the focus moves more and more towards larger strategies and away from micro-management type tasks.
• New "emergency jump" button that skips the current wave but severely damages the mothership. Can get you out of a tight pinch, but you only have a couple before it's game over.