Thank you for sending this over to me it was such a joy to play through! Your artwork is beautiful it gives extremely polished flash game vibes for sure! Everything about the presentation is great from the quirky monster sound effects to the subtle particles.
In terms of gameplay the concept is relatively simple yet easy to understand and there is a layer of complexity due to the layout of the levels, the way the monsters move and the periodic upgrades of the hero that improves the overall engagement.
In terms of improvements I think some level diversity (in terms of themes/biomes) would help a lot & maybe considering giving the players a skill system to add more interactivity beyond just flinging their little alien guys.
I think the hero upgrade system works well and fits the theme great but maybe it could be reworked to include buffs for the players aliens at the price of buffing the hero too I’m not sure the finer details of that but was just a thought I had.
In terms of the layout of levels maybe adding traps that can hurt both the players aliens and the hero would make navigating that a little more fun :]
