Well made game! I included it in my compilation video series of all of the GBJam 5 games, if you'd like to take a look :)

Great game. A lot of fun! The smoke trails on the shots look great.

I liked the 'nuke' shot that the original tank game has never had~

Well done!

Pretty cool! Difficulty curve was pretty good though I did have some cheap deaths. One annoying bug is that if you're holding space to shoot you might end up accidentally skipping through the upgrade screen (or what I think is the upgrade screen, I never successfully used it.)

This is cool, one level the spawn kill was real :( but was fun. This might be one your list but a change of where the goal is would keep the flow going.

Very nice Game Boy feel!

I enjoyed play it! =)

Good work!

Nice and simple with an easy learning curve, and the progression in difficulty has a good pace. Nice work!

This game is great! I enjoyed play it.

I played the original Battle City in game boy a long time ago.

Good job!

Nice game again, with the removal of a few effects this would certainly run on the old gameboy and it's a pretty fun experience. Made it to level 12 and as others have said, the difficulty curve is nicely done, cool stuff!

I enjoyed this one! The random generated levels increased nicely in difficulty and I didn't feel like there were any big spikes or troughs.

Very well done game.

I liked this a lot! Good job :D

Had a lot of fun! I liked the gameplay. The enemies are hard to kill when they 'group' up.

Rated and my comment is on the micro-review thread :)