A solo game-dev log

Build, stumble,
write again.

RPGs, puzzles, mahjong... Yuu's solo game-dev blog. Finished or abandoned, it all gets written down.

Play Flyjong Read the posts

flyableheart.com/flyjong

Latest posts

View all posts

2026.10.10

Blastline has been released

Hello, this is Yuu! Just as I announced in my previous post, Blastline, the game I had entered in Defold Game Jam 2026, went live on itch.io and Wavedash on Monday, October 5. BlastlineDash through the night city as a vampire girl, blasting the smartphone zombies swarming your fuse. Play in itch.io Play in Wavedash This one turned out to be a game I have a real attachment to, so even though it’s just a release announcement, I’d like to write a slightly longer piece and go over how the two weeks of development went.

ReleasesBlastlineDefold-Game-Jam

2026.10.03

I'm Taking Part in the Defold Game Jam

Hello, this is Yuu! Last week I posted my look back on the js13kGames feedback, but without ever announcing it on the blog, I had actually entered Defold Game Jam 2026, which ran right after js13kGames. Two days left until the deadline. Today is the real crunch, so with time this tight, I’m keeping this post short. This is my first time using the game engine Defold. I had started building a game in Love2D after js13kGames, and since both are built around Lua, I went in expecting to have no trouble with it. I had only worked through a few tutorials before the jam started, so there was plenty I didn’t understand at that point, but by now I’ve gotten fairly comfortable with it. I had never used integrated environments like Unity or Godot before, so this kind of editor isn’t my strong suit, and yet it turned out to fit me reasonably well.

Game DevelopmentBlastlineDefold-Game-Jam

2026.09.26

Looking Back on the js13kGames Feedback

Hello, this is Yuu! The voting period started on September 14, and so far I’ve received 20 pieces of feedback across the two games. That’s ten each for Rainbow Speed and Prism Rush, and both include one comment from an expert. Thank you again to everyone who left feedback. I actually started writing this post last week and ended up rewriting it. I feel like I spent a bit too much time on replies, both to comments on my own games and to other people’s entries. That said, there was a lot to take away from each individual piece of feedback, and rereading them made the gap between what I had designed at the time and what actually came back quite clear. I’d like to go through it game by game.

Js13kgamesRainbow-SpeedPrism-Rush

2026.09.19

Flyjong has been released on Wavedash

Hello, this is Yuu! I released my mahjong game, Flyjong, on Wavedash. The Wavedash Version For the Wavedash version, I removed the sexual content and story sections. The game is now focused entirely on playing mahjong itself, so I think of this version as something like a “casual version where you can just try the gameplay.” I also added English language support this time. Given the nature of the platform, there is a good chance that players who don’t speak Japanese will try the game, so I thought it was worth supporting English.

ReleasesFlyjong

2026.09.12

Prism Rush has been released

Hello, this is Yuu! As I mentioned in my previous post, there were some issues when submitting the game, but it was successfully featured in the online category of js13kGames. Prism RushCollect as many gems as you can in 90 seconds! Lock on, chain nearby gems together, and release to capture them all at once. Play in js13kGames This time, I’d like to look back on the game and talk about how it turned out.

ReleasesPrism-RushJs13kgames

2026.09.05

Taking on the Online Category

Hello, this is Yuu! I finished my js13kgames entry last week, and while I personally think it turned out quite well, the number of entries in the general category has grown rapidly since then. There are already 63 submitted entries, and if we include unfinished ones, there are well over 100 entries in total. In contrast, there were only four entries in the online category last week, and there are still only five as of the time of writing this post.

Game DevelopmentPrism-RushJs13kgames

Build, stumble,write again.