Well, thanks for playing, and taking time to write a comment :)
It does feel like it after some time, and I ended up in your situation. It's got to do with the way we handle enemy spawning I think (Basically it spawns more and more frequently, but at one point it spawns so much you're overwhelmed)
As for the merging, we did write about it in the game description.
Again, thanks for playing, and giving feedback :)
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I still think that a little tutorial doesn't hurt ;)
If you have time check our game : https://abel-graux.itch.io/hacker-man