Reposting my thoughts from the PSN Content thread, since people are looking for impressions:
If you've played a Tower Defense game, this isn't going to come across as obscure to you - it plays similarly. Each level has a preset layout, monsters come in waves, you have to stop them. One major difference is that you actually control a character (the brown gentleman with a shield on his back), so you do have to avoid running into bad guys or else you drop some gold and can't move for a few seconds.
The controls are very simple - analog stick and the X button, nothing else. Very easy to pickup and play.
Any of the trees you see on the level can be converted into a tower if you have enough gold. I believe there are about 10 kinds of towers - finishing the tutorial unlocks three for use. Like most TD games, you get some for anti-air, some for ground troops only, some fire and ice...I saw some other interesting ones, like a laser tower (pictured below). If you sell off your towers to recover gold, you can't rebuild at that tower site - something to keep in mind strategically. The flags on the towers represent the level - I've seen green, yellow, red, and purple during my play.
Each level seems to have 10 waves of enemies. There's a world map that lets you shift between levels, and there's a healthy number of levels (5 normal, 8 medium, 7 hard) to unlock.
Unlocking new towers for purchase, as well as upgrading your existing towers, can be done through the green round gems you see pictured. Once you have enough (shown on the little sign at your village), you can run back to your village and unlock a new tower. Or, if you want to just upgrade a tower, you run over to it, hit action, and select the upgrade option. Most of the upgrades cost one gem, some cost two. Enemies will always drop gold and sometimes drop gems; some of the trees in the level will drop coins if you touch them.
Towers will also level up on their own through hitting enemies, or you can help power level towers by standing on top of them, at which point your character begins to dance.
Oh, and there's a standard TD mechanic of giving you bonus interest at the end of a level for gold unspent. And you can upgrade this rate.
The animation is very smooth, and the art style is pretty nice. The music - it's ambient electronic-ish. I like it, but the sound effects and music combined to lead to my wife yelling at me to turn the game off because she was trying to sleep. To each their own.
There's some basic HUD elements not shown in these screens - a small strip at the bottom shows the time until the next wave and your gold, and your villagers left are displayed somewhere that I'm forgetting right now. When you're touching a tower, you get an overlay for its range and experience level - all in all, it's very easy to follow if you're familiar with the genre.
Each level has its own online leaderboard, and you get a full set of stats and graphs when you finish a level showing how you fared. There's also a two-player mode that I haven't explored yet, I'm guessing it's local only.
It's really a lot of fun; it's a great console-based TD game. PixelJunk claims it's shipping this month in the US (I thought it had gotten pushed back to January?), and like I said earlier, the version on the JP PSN Store is already localized in English.
I think a lot of you guys are going to dig it. Oh, and I haven't seen anything about downloadable content.
I haven't tried PSP remote play yet, perhaps I'll try tonight.
If you guys have any other questions, let me know.