This is a good game :) I think the upgrade mechanic is really fun, and it feels good to be able to gradually get farther towards the portal. the models and music are also very nice, really does feel like the vibe of a cheap plastic flying toy that's a few bumps away from dying. however, i think collecting coins to be able to afford upgrades is a bit tedious, since they only spawn at the starting area and you can only get 2 or 3 at a time. Perhaps it could be made a bit easier by having more spread out through the level, just above the floor? Good game regardless, well done!