Thanks for taking the time to play and comment. Definitely wanted more upgrades, you get power from the different guns you get through the perk system but I did want to do modifiers like 2x your current etc and also enemy buffs so they become quicker/more powerful/more HP etc but just didnt have the time in the end.
As for dash, in the latter rounds it can catch you out dashing too much as there's a lot of bullets etc on the screen but ultimately I made a decision to have no cooldown due to the theme being overpowered. It's op to have unlimited dash, unlimited ammo, no reload, 1000HP and perks that wipe out lower enemies or half the bigger ones refreshing so often.
If I work on the game post Jam, I'll definitely implement all of your suggestions. Have a great day :)