In-game the version is 1.4, but I couldn't find this in the version list. The SWF was downloaded using Flashpoint. I used Ruffle nightly 0.1.0 with libTAS 1.4.4.
The run starts when "New game" is pressed (click inputs in this game are handled the frame that the left mouse button is released; game runs at 30FPS) and ends when the shadow person is killed by the light (i.e. it points directly forward).
It's a quite simple run, just clicking on stuff on the earliest frame possible. Not that much to it.
Note: I initially uploaded the video below as the encode embed link, not knowing it should be cut down exactly to the TAS length, which is why it says the length of the run is around 30 seconds longer...
ikuyo: Claiming for judging.
ikuyo: Hello, and apologies for the delay.
As pointed out by Spikestuff, this submission is not well optimized. Rather than specific points, it seems that every major action was executed some frames too late. Considering the interactions via clicking are the only gameplay component of the game, I believe this is enough to justify my decision.
Rejecting for suboptimal play.