Fun and addictive! Definitely had me wanting to play it for a while to get a high score. 

I did find a sneaky cheat where you can hide down the bottom and avoid all of the death spores but other than that, good game!

A good submission, controls work well and the visuals and sound effects work well with the game. However I did run into a bug in that if you press the keys in quick succession you can actually go outside of the game area and will still be awarded points.

A decent submission, tight controls, some really neat visuals and decent difficulty progression (if a little too steep). Some more polish and this would be a game that could be put on a marketplace.

One thing you should consider is how the game is accessed. Is a zip file with a bunch of folders and files, which could be daunting for a hyper-casual audience, the best way to distribute your work? Next the difficulty progression could be a little slower, it reaches it's max difficulty fairly quickly. Next, you can break the top or bottom boundary by spamming the direction key, so some playtesting would have been nice to find bugs like this. Finally, two seperate keys would count as two seperate inputs, is this really a single control game? For mobile this could be a swipe up/down which would count, but what about PC?

All in all, a good submission with some oversights that once addressed in conjunction with some additional polish would be a marketable game. Nice work. 

I really love the visuals, the blob explosions are satisfying and the parallax scrolling looks great! Movements are responsive and the game provides a decent amount of challenge. I'd definitely play more of this! Although I do have to question if this meets the 'single control' prompt as it uses two keys.

One bug I ran into is that if you double tap the down key you will move down into the area below all the obstacles, and thus avoid everything.

Overall really good submission that I enjoyed!