I can't play, when I try to open the game an error appears which says "RPG???2000??????????"
A true love story under the sea. · By
This game is made using a game engine called RPG Maker 2000 (RPGツクール2000) from Japan. The trouble with that is, you have to install the RTP (Runtime Package) to run it and the RTP must also be the Japanese version.
The installation process is very user-unfriendly on non-Japanese Windows operating systems, you'd better download the English version of the game since it has the RTP built-in: https://vgperson.com/games/wadanohara.htm ,
or you can play it online: https://plicy.net/GamePlay/89767
Versions in other languages: http://funamusea.com/story/wadanohara/#:~:text=%E5%B7%A5%E4%BD%9C%E5%AE%A4%E6%A7%98%E3%80%8D%0A%E3%80%8C-,espa%C3%B1ol,-%2D%E7%BF%BB%E8%A8%B3%2DTsumin
By the way, the online version is missing some sound effects and music, making the experience incomplete.
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Omake: There is an open source alternative to the RTP: https://easyrpg.org/player/downloads/
Put the Player.exe in the folder of the game (English version only, otherwise there will be Mojibake) and run it.
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RTP: https://rpgmakerofficial.com/wp-content/themes/official/assets/files/support/rtp...
Locale Emulator: https://xupefei.github.io/Locale-Emulator/