How did you know we were mining bitcoin?! :O
Joke aside, it does indeed seem like a SteamVR-plugin was active in our project. We started with the TopDownTemplate from Unreal, but have now removed the plugin. We also discovered that our spikes, that we made from ~20 static meshes for each spike-section, was rendered individually. This was quite resource-intensive, making some levels laggy. We have now replaced this with one combined static mesh, which improved the performance immensily.
We have had fun this week with bug-fixing and polishing, and hope to have a new version uploaded here soon. We planned for 10 levels, which are now playtested, and this time it's actually possible to complete det game ;-)
Thank you for all the helpful feedback, awesome to hear you had fun with the game, even in it's jam-state =D