Neat game! Love the 80s retro-style graphics and music, and the use of 3D is interesting.
I started with the Windows desktop version first. The Windows 1/2 interface look at the start was cool, but I was a little confused as to why the Trash icon exited the game. It would have been even more confusing to me if I had started with the web version of the game first before trying desktop one, because the Trash icon does absolutely nothing on the web version, which would have led me to believe that it would have done nothing on the desktop version as well. Also, maybe it's just my browser, but there's no sound or music in the web version.
For the meat of the game, as fun as it was, it was pretty short. It was also too easy, as the obstacle provided little challenge - enemies, including the boss, had very simplistic AI, and non-enemy obstacles like the 3D boulders and spikes did little damage, which I had expected to take out like 1/3 or all of my life. The power-ups in the game, I found, made the already pretty easy game practically devoid of any challenge. Once I had the spread fire power-up, every enemy was practically dead while I just held the Space key down. I found the score system a little pointless, as it didn't do anything during or at the end of the game (no high score listing, no extra life after 1000 pts for example, etc.). As I mentioned, the 3D stuff was great, but I did find the 3D screen tilting effect to be a little disorienting and, honestly, annoying.
I'm not sure if they're merely bugs in the game, but on certain walls, I could wall hop on them, Mega Man style. I'm just gonna assume it was intended, since it appeared that you had to do this in order to get on certain platforms. Another bug is the boss fight - because it never leaves the 'boss area' boundary and just goes back and forth, I could just stand on a spot to the left without entering said area and blast it with the spread fire weapon, killing it before or not even entering the battle zone.
The ending part was also a little interesting. Unfortunately, I don't understand why the right-to-left, bouncing Marquee text had to move so slowly. I felt that quickly putting the message on a single screen letter-by-letter or making each sentence appear one by one would have been much more effective. The whole reason why I say this is that, whether on the desktop or web version, the bouncing-Marquee-whatever message actually cuts off without finishing and I get brought back to the Windows 1/2 screen.
This game certainly has a lot of potential, but it was just overly short, and it was too easy. I was expecting at least some challenge, but unfortunately I did not find it in this game.