I had an issue starting the game up; it would start up Steam and bring me to the store page without actually starting the game. For anyone else with this issue: I was able to work around it by going into the game directory and renaming/deleting steam_api.dll.
Massive Update for Hiiro
I've just released a major update to Hiiro, which I hope fixes essentially ALL of the issues that have have been reported over the last year, including glitches related to the save system, music system, game engine, controller support, and hopefully even those frustrating unexpected errors. Plus, some minor bug fixes, graphics updates, and such. Additionally, the game now includes an option to start a new game!
If you've purchased the game, this update may download automatically. Otherwise, you should be able to simply download this updated version from its webpage here on Itch.