SUPER IMPOSTOR BROS. Pros:
+The sprite work is great, per usual Lumpy methods
+The jumping and the controls may take sometime to get used to, but once you do, it feels nice to control it
+Music is top notch for a Game Boy game (great work Melon)
+Story is nice and simple (you either try to prove that you're the better impostor, or let your brother become the better one and having a wholesome dynamic)
+The secrets are a nice addition, plus great references to your previous and upcoming works)
Cons:
-The last keycard on the first level is way too cryptic to know where it is (only found out about it per other people's playthroughs), while managing to find the rest of the keycards of the game without guides (mostly)
-The weight of your crewmate can feel a little too light at times, making you constantly overshoot your jumps for no good reasons
-Some obstacles are near impossible to dodge without getting hit.
-I feel like there should be different endings depending on how many items you managed to find in your playthroughs, cause having the same 2 endings, regardless of what item you used the previous levels feels disappointing)
Bugs:
*On a rare ocassion on Level 2, upon climbing up the stairs after finding the secret, the enemies on screen stopped moving.
*If you get hit by an enemy while moving to the next room at the same time, the next room's particles move considerably off where they would normally be, while the hitbox remains where it is. For example, if i were to get hit by an enemy in Level 2 and moving to the next room while the shaking and sprite still occur, the next room will render, say, the electrical shocks that hurt you a few pixels away from where it's supposed to be set.
To fix it, just get hit again and the sprites will return to their right positions
In conclusion, i give this game 4 stars out of 5.
