Wow, this was a really great adventure: it's short but incredibly sweet in my book and surprised me quite considerably!
It's true that it is a little short especially in terms of exploration where all of the collectables are within like 10 feet of each other, it's a little janky with bullets not functioning sometimes and some events not resetting properly like how the alien talk prompt reappears on continue even though you've already gone past that point, it can be a bit annoying with the floating eyeball enemies showing up and the way they phase through walls to attack you with no way to defend, and it is a little simple in a lot of respects, but goddamn if I didn't have an absolute blast with this!
I absolutely love the Blaster Master-esque player/vehicle synergistic gameplay with various upgrades, and I found the story and dialogue so wonderfully goofy and charming: I just couldn't stop playing with the way the pace kept everything going. The end boss fight was a great cherry on this sundae that I was really impressed the game had, especially with the cool escape sequence at the end. Very well done!