Cool game! I really like the aesthetic, makes me feel like it's some sort of disco!
Personally I didn't really notice that I had grid-based movement, and it was a bit unclear if viruses had shields at times, but I got through it in the end!
Also, quick note, seems like using the arrow keys on the page for the game also scrolls the page up and down - luckily the page wasn't too big so I could still play it fine but might be something to look into!
Still think it was a neat game and I enjoyed it!