If you are specifically seeking the original v1.04 for compatibility with old mods or replays:
The full Elasto Mania Remastered is available for purchase on Steam and GOG.com . This version includes the classic levels and modern enhancements. Elasto Mania Free Download (v1.04)
Many older versions of the full game found on "free download" sites are often unauthorized or may trigger security alerts. It is recommended to use the Official Elasto Mania Website to find legitimate links. Elasto Mania If you are specifically seeking the original v1
It is also available on the Nintendo eShop for Nintendo Switch, as well as PlayStation and Xbox consoles. Legacy Version Information (v1.04 and others) It is recommended to use the Official Elasto
The official version 1.04 you are looking for is traditionally part of the of Elasto Mania , though a limited shareware version was originally distributed for free. For the most stable and modern experience, the developers now offer Elasto Mania Remastered on major platforms. Official Download & Purchase Options