I was happy to see that while this is a download only game, it was marked as supporting Linux as well as Windows, and Mac. Upon downloading, I only saw a Windows executable. If you have Linux and Mac versions, then you will need to update the file. If you don't have versions for Linux and Mac, then please don't list as supporting them.
This is a decent start to an Asteroids clone. The controls are simple. Pressing down bringing you to an immediate stop was unexpected, but is very useful. Movement feels reasonable, though it can get crazy with one of the power-ups. The power-ups being time limited is a good way to prevent the player from becoming too powerful, while still giving some bonuses. The enemy ship spawning 2 when you defeat the last one is an interesting choice. It is a threat and it would be nice to remove the threat, but doing so can make it worse. I tried just rapid firing at them destroying them as they spawned, but inevitably one would get a shot off in my direction before long.
It would be nice if you added a high score so players can keep track, and try to beat their previous record. I didn't pay much attention to score during the game, but at the end it would be nice to see how you did compared to previous games.
I read through your dev log. It looks like you have been editing the same dev log with regular updates. It would be better if you made new dev logs so people will know when there is new content, and can read just the new stuff, without having to scroll through all the previous things they may have already read through. It also looks like you responded to someone's comment in your dev log, but not to the comment itself. Responding to the comment would generally be better. The person is unlikely to see your reply in the middle of an older dev log. With a reply they will get notified and you could potentially have a discussion on it.