Can't really say anything else than only positive things about the sound, art and design. As the other's have said, auto-restart is needed, and I think that the R key should be used to quick restart. Personally didn't think it ramped up in difficulty too fast. Although it would be interesting to see hard versions of all the levels, as I enjoy a good challenge.

We had a lot of fun testing your game during our live stream today, here is a link to the video archive if you missed it or wish to check again:  https://www.youtube.com/watch?v=qFx5tA14Nyc&t=375s

Unfortunatly we are really bad and coudn't pass the first complex level :( This prevented us to test the mutations that comes later, but we saw a bit of them on the gif from this page.

Really enjoyed the game! Very well-polished game design, interesting puzzles. Truly appreciated the tutorial part. Great art and very nice mood. The only things I would improve are adding an auto-restart when everyone dies, some menu/UI and increasing the difficulty more gradually as it was already quite challenging on the third level. But you know, I'm glad you decided to invest that time into game mechanics and design because it turned out to be amazing! Well done!

I wish I was better at twitch platforming, as it stands I didn't get to experience what look like neat features in the screen captures. The look is super cohesive and I really enjoyed the light and airy mood of it all.

really polished and well-executed! definitely a little too hard to start off tho

Very cute game and well polished, the controls are really smooth! Little bit difficult for me though and it would be awesome if I didn't have to press respawn to get back into the action :)

Nice game!

The level of polish is amazing. Congrats on the cute art direction

Your game has the best graphics i've seen so far, I love pixel art. Great Job!

This is really wonderful, the puzzles were great and it had excellent game feel. I love the way you utilized the theme, it's impressive that you put together something so complete in such a small amount of time!

Can't believe it's created in 48 hours! The puzzles are so well designed with awesome mechanics. Just a minor suggestion, as we only need to use the keyboard for control, that'd be great if we can restart the level with the 'R' button or even better if the level is going to automatically restart when there is no virus left in the scene. Sometimes I find it not so user-friendly to move my hand onto the mouse and click the restart button. (Becoz I died too much x_x). Excellent game indeed!

Awesome game. Polished. Respect the theme. Good level design. Controls are mastered. Great job.

Had a lot of fun in the levels, and especially so in the ending screen!

This game is a lot of fun! You could literally just add a little more polish, levels, and perhaps achievements and create a solid steam release (if you wanted to). Nice job guys!

Fun game! A couple suggestions, though: first, it'd be nice if it was faster to restart and if there was a button that you could press. Also, I'd suggest not restarting the music at the beginning of each level; that was kinda jarring.

I really liked this game, the art was great, simple controls, diverse mechanics, and well polished. this is a really solid game, and i enjoyed it!

This really feels like a leggit Nitrome game. 

Very cute. The interactions with multiple types (small and multiply, to get multiple smalls), and the stacking/high jump mechanic were clever touches. Great work!

Really great. Most polished game I've seen so far. A lot of other entries had similar ideas, but this was my favorite implementation. I would suggest making the camera zoom-out a toggle instead of a hold.

Really well made and polished game! The puzzles are well designed (took me longer than I'd like to admit...) I really like the physics of the viruses, they are really satisfying to control! I would only recommend a restart button on the keyboard instead of having to click something on the screen. Overall really good game!