soyukke (そゆっけ on Zenn) is an office worker who makes games as a hobby, according to the developer's Zenn article. Besides まるかいてドカン!, the article lists two Steam games: Capsulitas, released on 24 Sep 2026 after being developed earlier, and トロッコ問題は、問題じゃない。, also made with Opus 5.5, with early access planned for 19 Oct 2026.
A free doodle tower defense on notebook paper: draw circles for cannons, lines for walls and triangles for mines to stop marching stick figures. The developer says it was made with Opus 5.5 and that the first version ran after a little over an hour.
