SP4CEBAR 2021-09-12 20:14 (Edited)
Feel free to give your ideas of what I could make out of this.
I like the infinite gameplay (it fits really well with the NyanCat theme)
By only storing the current NyanCat-animation frame inside the character RAM I managed to save quite a bit of character storage, enough to add some weapons
Thanks to @Dan for making the trail
1.1 I added a laser and a random weapon selector which is triggered every 3 seconds
1.1.1 bugfix
1.1.2 updated the thumbnail
1.2 added power-up items which you can pick-up
1.3 added WASD keyboard support