LÖVE

Right mouse to change direction blocks get drawn (up / down or left / right)
Left mouse to draw line

Don't let a ball collide with your line as it is drawing and see how high of a score you can get.

edit: added an image in play

I don't know what's the problem, but when I click on start this happens:

Hmm, just some copy & paste code from some of the shaders I am playing with for the backgrounds. Admittedly, a few of them are rather obnoxious but it's a learning experience

Removed the code from the 2 shader files and the backgrounds still work. Thank you for trying it. Hopefully you have time to give it another shot and it works this time.

Nope, same as before. BTW, the last file you uploaded is a windows executable. I had to run it on Wine. Upload love files if possible.

Unfortunately, I can't help you since I don't know anything about shaders.

EDIT: And this may be a Linux issue, I don't know. If it works on your computer, wait for other people to chime in.

Thanks again. Re uploading with the love file. I was wondering why the 2nd version was so much bigger . Going to also test it from my Ubuntu machine in a bit.

edit -- It works from my linux system. For anyone else who gives this a spin, note that the included highscore file (creatively named 'hs') needs to be in the same directory as the .love file or it errors. Not sure why but if you know how to fix that, please share

Also, I swapped out the mouse cursor and disabled a few of the backgrounds that I now realize are particularly annoying after the initial "cool a working shader" adrenaline has worn off.

It works now. And it's a good game.