Excellent breakout, with some really nice features. I love the quirky graphics. I've played a lot of freeware breakouts over the years and this definitely stands among the best freeware breakouts (e.g. Beat Ball, DX Ball, Peoing, Jardanians, Jarkanoid 3, Powball and Takamaru to name a few of the freeware games I still play occasionally) .
I'd love to see MadCowBalls on Steam; I would be happy to pay the same price as MadCowsBalls 2 (which I purchased but can't get to work {possibly due to running Win 10 Pro}. Personally I think your v2 is worth more than what you are selling it for).
I've played hundreds of breakouts since the very first one was released back in the 1970's; I spent a small fortune on the original Breakout via one of those stand alone cabinet games from the late 70's (while I was in the army over in Germany; it used to cost 1 Mark for three goes - that was about £0.33 at the time as the pound was devalued while I was over there) and throughout the 80's they were popular in most public gathering places. They even had ones where you could sit down and play via a table like cabinet.
I think this free version is well worth some money. Maybe you should add it as a DLC for your Steam version? I realise you have to pay to get games on Steam, so you could ask the community via the news page for MadCowsBalls 2, to gauge whether it would be profitable. I don't know Valve policy, but they do allow free games on their site. Maybe it could be added aas a free DLC for MadCowsBalls 2. That may evn boost sales for your commercial version?
Sadly breakouts don't seem to have been very popular for the past decade, at least with developers. There have been a few decent ones released since the seminal Ricochet Infinity was released back in 2007, but generally breakouts are sorely deficient on both Steam and generally. :)
Regards Whiterabbit01