It's happening! We didn't want to promise anything until we tested to make sure it was feasible, but we can now officially say that Super Grapple Day will have one of the most-requested features since we've started the project: a procedurally generated Endless Mode.
This gif still comes from the Story Mode, which we're finishing up. It shows an Overkill, a special technique that Ilya can use after she's defeated any opponent. But screenshots of Endless Mode should be coming soon!
If all goes well, we're hoping for a release date sometime in July or August.