AS others say, too easy, very grindy, needs more enemy types to justify anything that isnt damage, key waves would be nice as in a calculated jump in difficulty that would "force" a backing to be able to use stuff, add new music would be great. different sound effects, enemy sounds, , a way to know that the time increase is one, or just have the max speed the base speed always buy allowing you to upgrade to let the game actually run, i stopped upgrading things at wave 100 since i was bored. also, if all enemies in a wave are dead, please move to the next one, or at least have that be an early upgrade available as a toggle or something, s(since sometiems you might want to regen and not force next wave) Also with the key wave thing, have them be checkpoints unlocked type thing, since starting at wave 1 every time feels pointless since my base stats increase with all shopping instance. didnt feel like i made any choices, Also, the boss kill rewards didnt feel impactful at all, i get 6 credits? i think thats waht it said at wave 50? when i had 2-5k?. If it is intended to be an idle game, let there be an option to have it run in background (or seperate tab) Maybe give players something to actually do outside of upgrading too. skill trees, classes, build routes, idk IE, a second base unlocks at certain wave/upgrade, spells, a controllable guy that you can run around, so you make the choice of idle or active play upgrades, story content if planned, Just ideas, im not a designer or anything, just throwing things around. i feel that things like crit chance should have a log cost increase or something, since each point you get in things with a max # get better, Damage scales too fast i think, i just kepty my dmg at 2x their HP always. Despite how it might sound, i had fun and you doing good work, whats there feels good and engaging enough, keep it up!
BUG:i play on ultrawide, when i went to fullscreen, then came back in mid wave, the enemy stopped outside of my range and was hitting my base, i had to remaximize, it started moving again, then minamize during a wave they didnt attaack from the right hand side, or at the end of the wave so it didnt happen.
BUG2: scrap/wave purchase button always highlighted.
EDIT: found the stuff to spend my crystals on, was kindof hard to notice for me since the buttons are small and at the bottom right thought i didnt have it unlocked yet. might want to bring it into focus more, or again short tutorial at some point. however the things there at current standing dont feel like they do much since too easy as is, Also, im not sure what some of the things do, like berserker.