InfinyDrop is a multiplatform single player game in which the player is falling from the sky and is trying to avoid landing on spikes
Yes, InfinyDrop is open source and licensed under the 3-Clause BSD License.
The web version is available, and more releases will follow.
Currently the beta version of InfinyDrop is only available on its website, https://lukaj274.github.io/InfinyDrop/. However, I am planning to publish to desktop platforms (Linux, macOS, Windows) very soon and Android in the near future.