Game 2 (https://miiverse.nintendo.net/posts/AYMHAAACAADRUqGHNDW6-A): Completed all puzzles in Picross e4, including the bonus puzzles unlocked by having save data from the first three Picross-e games.
(https://d3esbfg30x759i.cloudfront.net/ss/zlCfzSJ8MNo5ScltuX)
(https://d3esbfg30x759i.cloudfront.net/ss/zlCfzSJ8PlQSJtHBaz)
The Picross-e games are all really nice, and e4 is the best. It's the first one to finally have puzzles bigger than 15x15 (only up to 20x15, and only a few, but still). My personal favorite feature, though, (which was actually first added in e3, now that I check) is the ability to use Free rules on every puzzle. In Normal rules, putting a mark on an incorrect square gets immediately marked as incorrect and gets you a time penalty. In Free rules, you don't know if you're right until you finish. I like that better both for the increased challenge and because I have times when my hand slips or I'm not paying attention for a second and mark a square I didn't mean to, and in Free rules, I can just fix that myself instead of getting a couple minutes added to my time. So anyway, yeah, if you like Picross but only enough to buy one game of it, e4 is probably the best choice (though if Mario's Super Picross is ever available on the Wii U VC in your region, that might be even better).
Game 8: SteamWorld Dig
(https://d3esbfg30x759i.cloudfront.net/ss/zlCfzSYzAWE3ZMi6eK)
(https://d3esbfg30x759i.cloudfront.net/ss/zlCfzSYy_PEpQf0h7w)
So this is kind of a Metroidvania-ish game, I guess. You're a robot and you dig, and you keep digging to find powers that let you dig further and money to buy stuff that lets you dig faster. And then there's a boss battle at the end. It's quite short, probably falling into the category of video game candy, but it's very well designed, with a very clear and satisfying feeling of progression. Sound is good, character design is good, controls are good.
This is the fourth time I've beaten it, and my first time doing it in under 3 hours. A run under 2 hours probably wouldn't be too difficult for someone much better at video games than me. My first time through, my 3DS's shoulder buttons were broken, so I couldn't switch weapons, but it was actually still beatable. There are places where you need the drill to get through a rock, but if there's a laser nearby, you can lead the laser into the rock and break it that way. There's a lot of potential for speedruns and challenge runs here.
I may end up rebuying it on the Wii U someday. I like it a lot.