Very polished game. This clicker/roguelike genre combination is really fun, and something I'm surprised a lot more games don't use.
I would like to claim the discovery of the clovered coffee combo. I was able reach the goal of 1000 before the half-way mark, which I would've liked an early ending. The coffee item in general seems to be a big balance problem.
Without any motivation to continue, I just sat idle for the rest of the time to tick by, which, like many of aspects of life, I blame the coffee entirely. Personally, I don't think letting the player change the amount of time they have in a day is a good decision gameplay-wise.
The overall atmosphere of the game is really cozy, and allows me to get immersed into the role of an office worker. The repetitive tasks allow my mind to relax and get into a flow.
At first I thought the anti-virus upgrades were useless, until later in the game... when still, I thought they were useless. For me they defeated the challenge of completing the little mini-games. But I think it's a good upgrade. Maybe not two of them.
Mini-game advertisements were not something I expected, but definitely needed. The game feels like it overstays its welcome quite a bit. As a player, I wanted to stop playing around half-way through (This could have also been because I already hit the goal.)
I believe the issue was that you were trying to cram too little content into too much time. You were able to create so many unique upgrades and advertisements, but even still, they were not enough to satisfy a player's curiosity over the course of 31 whole days. Personally, I think the game would've been much better if you just cut the time and goal in half: 14 days, 500 euros.
Finally, my biggest issue, is that the game is unbearable to run on a browser. I couldn't even last one week before switching to a sandbox to download the game.
All in all, For a jam game, this is really amazing.